The interpretation timeline
Joshua 3:17 Douay-Rheims

And the people marched over against Jericho: and the priests that carried the ark of the covenant of the Lord, stood girded upon the dry ground in the midst of the Jordan, and all the people passed over through the channel that was dried up.

A.D. 395 – 1875 7 witnesses

Patristic

before A.D. 750
395
A.D.
Gregory of Nyssa Patristic
c. A.D. 335–395
“Joshua son of Nun made the Jordan River stop, but only as long as the ark was in the water. As soon as the people had crossed to the other side and the ark had come through, he gave the river back its usual flow again. The bottom of the deep in the Red Sea was denuded of water when the sea was driven back to either side by the Spirit, but the duration of the marvel was the passage of the army through the deep on the dry strip. But after that the surface of the sea became one again, and the temporary gap was flooded over. So this remains a unique event which occurred in such a way that the marvel did not lose credibility because of the passage of time, since it continues to be testified to by visible traces.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“And the Kohanim remained standing. They remained standing at the edge of the Jordan. In the midst of the Jordan. So long as they remained standing, the upper waters did not descend below, and during this time all the people were crossing on dry land. Firmly They were placed firmly, exactly opposite each other.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And the priests that bare the ark of the Lord stood firm on dry ground in the midst of Jordan,.... Which for its breadth Mr. Maundrell, the above mentioned traveller, says (c) might be about twenty yards over, and its depth exceeded his height; but Dr. Shaw (d), a later traveller still, says,"the river Jordan is by far the most considerable river, excepting the Nile, either of the coast of Syria, or of Barbary. I computed it to be about thirty yards broad, but the depth I could not measure, except at the brink, where I found it to be three yards.''Now in the midst of this river the priests bearing the ark stood firm on dry ground, the waters above being stopped and those below cut off. This perhaps might give rise to the fables among the Heathens of the river Scamander being swelled for the destruction of Achilles, and dried up by Vulcan, of which Homer (e) makes mention; and of the river Inachus, dried up by Neptune, as the Grecians fable; however, if Heathens can credit these accounts, surely we Christians ought to believe this, attested by divine revelation. And this may denote the presence of Christ with his people in afflictions, who will not suffer those waters to overflow them, and in death itself, when the swellings of Jordan shall not come near them to distress them; and when the covenant of grace will appear firm and sure, and be their great support; and when also the feet of the ministers of Christ stand firm, and their faith fails not; which is of great use, and very encouraging to the spiritual Israel of God: and all the Israelites passed over on dry ground; the waters being divided to a space large enough for such a body of people to pass over, and which continued until all the people were clean passed over Jordan; perfectly and completely, not one being left behind, or lost in the passage through it; in the midst of which the priests stood until all were passed over. So the spiritual Israel of God must all go over Jordan's river, or must all go through the valley of the shadow of death; and they will all go over safe to Canaan's land, to the heavenly glory; their souls go immediately to heaven at death, and their bodies will be raised at the last day, and be reunited to them, and partake of happiness with them; nor will anyone of them be lost; they all clean pass over, and arrive safe; for they are the chosen of God, the care and charge of Christ, the purchase of his blood, partake of his grace, and have the earnest of his Spirit. (c) Maundrell, Journey from Aleppo to Jerusalem, p. 83. (d) Travels, p. 346. (e) Iliad. 21. Next: Joshua Chapter 4”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“The priests - stood firm on dry ground - They stood in the mid channel, and shifted not their position till the camp, consisting of nearly 600,000 effective men, besides women, children, etc., had passed over. 1. Is it not surprising that the Canaanites did not dispute this passage with the Israelites? It is likely they would, had they had any expectation that such a passage would have been attempted. They must have known that the Israelitish camp was on the other side of the Jordan, but could they have supposed that a passage for such a host was possible when the banks of the Jordan were quite overflowed? It was not merely because they were panic struck that they did not dispute this passage, but because they must have supposed it impossible; and when they found the attempt was made, the passage was effected before they could prepare to prevent it. 2. God now appears in such a way, and works in such a manner, as to leave no doubt concerning his presence or his power, or of his love to Israel. After this, was it possible for this people ever to doubt his being or his bounty? This, with the miraculous passage of the Red Sea, were well calculated to have established their faith for ever; and those who did not yield to the evidence afforded by these two miracles were incapable of rational conviction. 3. In some respects the passage of the Jordan was more strikingly miraculous than that even of the Red Sea. In the latter God was pleased to employ an agent; the sea went back by a strong east wind all that night, and made the sea dry land, Exo 14:21. Nothing of this kind appeared in the passage of the Jordan; a very rapid river (for so all travelers allow it to be) went back to its source without any kind of agency but the invisible hand of the invisible God. 4. Through the whole period of the Jewish history these miracles, so circumstantially related, were never denied by any, but on the contrary conscientiously believed by all. Nor did any of them in their revolts from God, which were both foul and frequent, ever call these great facts in question, when even so full of enmity against God as to blaspheme his name, and give his glory to dumb idols! Is not this a manifest proof that these facts were incontestable? and that Jehovah had so done his marvellous works that they should be had in everlasting remembrance? Reader, the same God who is over all is rich in mercy to all that call upon him. He changes not, neither is he weary: trust in the Lord for ever, for in the Lord Jehovah is everlasting strength; and He ever saves his followers out of the hands of all their enemies, and, having guided them by his counsel, will receive them into his glory.”
Source
1849
A.D.
1774–1849
“Jericho, at Bethabara, which was five or six leagues from the Dead Sea, all which space was left dry. Jericho was three leagues from the Jordan. (Calmet) — Girded. Septuagint, “ready,” preparing the way for all the army. Hebrew, “firm,” and undaunted. (Haydock) — A great part of the day must have been spent in crossing the river, and erecting the two monuments. (Menochius) Ver 1. Days, in part, as they arrived on the 8th of Nisan, staid there the following day, and crossed the Jordan on the 10th, on Friday the 30th of our April. Thus Christ is said to have remained three days in the tomb, (Calmet) though he was there only a small part of Friday and of Sunday, and the whole of Saturday. Hebrew, “they lodged there before they passed over, ( 2 ) and it came to pass after three days that the,” &c.”
Source
1871
A.D.
1871
“the priests . . . and all the Israelites passed over on dry ground--the river about Jericho has a firm pebbly bottom, on which the host might pass, without inconvenience when the water was cleared off. Next: Joshua Chapter 4”
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“But the priests stood with the ark of the covenant "in the midst of Jordan," i.e., in the bed of the river, not merely by the river, "upon dry ground, הכן," lit., firmando, i.e., with a firm foot, whilst all Israel went over upon dry ground, "till all the people were passed over." This could easily have been accomplished in half a day, if the people formed a procession of a mile or upwards in breadth.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.