The interpretation timeline
Daniel 9:6 Douay-Rheims

We have not hearkened to thy servants the prophets, that have spoken in thy name to our kings, to our princes, to our fathers, and to all the people of the land.

A.D. 258 – 1871 4 witnesses

Patristic

before A.D. 750
258
A.D.
Cyprian Patristic
c. A.D. 200–258
“Although Daniel has already received manifold grace due to his faith and innocence and although he has received quite a reputation before the Lord in regard to his virtues and praises, he strives with fasting to be worthy of God; he puts on sackcloth and ashes and makes confession with tears.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Neither have we hearkened unto thy servants the prophets,.... To their explanations of the laws and judgments of God; to their admonitions, reproofs, and counsels; these they did not attentively listen to, nor give credit to them, nor yield obedience to them; but despised and rejected them, though they were the true prophets and servants of the Lord; such as Hosea, Isaiah, Jeremiah, Ezekiel, and others: which spake in thy name; they came by the authority of God, being sent by him; they delivered their message in his name, being his ambassadors; and which as it was an honour done to this people to have such men sent unto them, so it was an aggravation of their sin that they showed no respect to them; since their words were not their own, but the Lord's, which they spoke to all sorts of persons: to our kings; one after another, as to Ahaz, Manasseh, Jehoiakim, Jeconiah, and Zedekiah; kings of the house of David, and over the land of Judah: our princes; princes of the blood, nobles, and courtiers: and our fathers; meaning not only their immediate ancestors, but their subordinate rulers, civil magistrates, judges or elders of the people, as Jacchiades interprets it: and to all the people of the land: of Judea; the common people, as distinguished from persons of rank and figure before expressed. These several persons are named, partly to observe how faithful the prophets were in delivering their message to all sorts of persons, high and low, not fearing the faces of any; and partly to show that none could plead ignorance, or excuse themselves with that, since all had had sufficient warning and instruction: as also to observe, that the sin of rejecting the true prophets of the Lord was universal among them, all were guilty of it.”
Source
1863
A.D.
1796–1863
“Bar. 1 : 17. Conjunctions connect the following clauses in the text. St. Jerome remarks, that Daniel speaks in the name of the people.”
1871
A.D.
1871
“prophets . . . spake . . . to our kings . . . to all the people--They fearlessly warned all without respect of persons.”
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.