The interpretation timeline
Daniel 1:12 Douay-Rheims

Try, I beseech thee, thy servants for ten days, and let pulse be given us to eat, and water to drink:

A.D. 220 – 1871 7 witnesses

Patristic

before A.D. 750
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“The exception of certain kinds from use as food is a partial fast.… Daniel and his companions, preferring as they did a diet of vegetables and the beverage of water to the royal dishes and decanters, were found "more handsome" … and in addition were more spiritually cultured. For God gave to the young men knowledge and understanding in every kind of literature, and to Daniel in every word, and in dreams and in every kind of wisdom; which [wisdom] was to make him wise in this very thing also, namely, by what means the recognition of mysteries was to be obtained from God.”
Source
235
A.D.
Hippolytus of Rome Patristic
c. A.D. 170–235
“"Prove now thy servants." They teach that it is not earthly meats that give to men their beauty and strength, but the grace of God bestowed by the Word. "And after a little." Thou hast seen the incorruptible faith of the youths, and the unalterable fear of God. They asked an interval of ten days, to prove therein that man cannot otherwise find grace with God than by believing the word preached by the Lord.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“test Heb. נַס an expression of (נִסָיוֹן) testing. some pulse a type of beans instead of the food.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Prove thy servants, I beseech thee, ten days, Here Daniel manifestly includes his companions, and makes his request for himself and them; desiring that they might be tried ten days with different sort of food and drink, and see whether any alteration would be made in them for the worse; which was a proper time for such a trial; for in that time it might be reasonably supposed that their food, if it had any bad effect on them, would appear. Saadiah makes these ten days to be the days between the first day of the year and the day of atonement; but without any foundation: and let them give us pulse to eat, and water to drink; instead of the king's meat, pulse, beans, pease, vetches, lentiles, rice, millet, and the like. The word (d) used signifies anything sown, all kinds of roots, herbs, and fruits; and, instead of wine, water; meat and drink, it may be thought, that persons of such birth and education had not been used to; and yet they preferred these to the king's dainties, by eating and drinking of which their consciences would be in danger of being defiled. (d) , Sept.; "de seminibus", Montanus; "de sativis", Cocceius.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Give us pulse to eat - הזרעים hazzeraim, seeds or grain, such as barley, wheat, rye, and peas, etc. Though a vegetable diet might have produced that healthiness of the system in general, and of the countenance particularly, as mentioned here; yet we are to understand that there was an especial blessing of God in this, because this spare diet was taken on a religious account.”
Source
1849
A.D.
1774–1849
“Pulse. That is, pease, beans, and such like. (Challoner) — St. Basil hence shews the advantages of fasting; and Catholics, who imitate Daniel, may expect the like reward in heaven: and hope that such a pattern would not displease their dissenting brethren, but rather screen them from their profane sarcasms. (Haydock)”
1871
A.D.
1871
“pulse--The Hebrew expresses any vegetable grown from seeds, that is, vegetable food in general [GESENIUS].”
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.