The interpretation timeline
Joshua 1:15 Douay-Rheims

Until the Lord give rest to your brethren as he hath given you, and they also possess the land which the Lord your God will give them: and so you shall return into the land of your possession, and you shall dwell in it, which Moses the servant of the Lord gave you beyond the Jordan, toward the rising of the sun.

1105 – 1849 4 witnesses

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“The sun rises. Refering to the eastern side of the Jordan.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Until the Lord hath given your brethren rest, as he hath given you,.... Rest from their travels, as they had: and they also have possessed the land which the Lord your God giveth them: are settled in the land of Canaan, as they were on that side Jordan: then ye shall return unto the land of your possession, and enjoy it; the countries of Sihon and Og, they were put into the possession of: which Moses the Lord's servant gave you on this side Jordan, toward the sunrising; the land, given to them lay to the east of Jordan.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Toward the sun-rising - This is the East, as toward the going down of the sun signifies the West.”
1849
A.D.
1774–1849
“Beyond. The same expression is translated on this side, ver. 14. Hebrew beheber means also, “in the passage.” If we have regard to Josue, when he spoke this, he was beyond, that is on the east side of the river, though perhaps (Haydock) he might be on the other side when he wrote the history, Deuteronomy i. 1. (Calmet)”
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.