The interpretation timeline
Daniel 9:5 Douay-Rheims

We have sinned, we have committed iniquity, we have done wickedly, and have revolted: and we have gone aside from thy commandments, and thy judgments.

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.”

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“turning away We were constantly turning away from Your commandments, tolant in Old French, turning away.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“We have sinned, and have committed iniquity, and have done wickedly, and have rebelled,.... Some think there is a gradation in these words; that they had committed some sins through error and ignorance; others through infirmity and obliquity, or in the perverseness of their spirits, and the crookedness of their ways; and others wilfully and in malice, in the wickedness of their hearts; and others were open acts of hostility against God, casting off his yoke, and refusing obedience to him, and obstinately persisting therein. Jacchiades refers them to sins of actions, words, and thoughts, which they proudly and presumptuously committed. This heap of phrases seems to be used to take in all kind of sin committed by them, and rather to exaggerate than to extenuate them, and to confess them with all their aggravated circumstances; and Daniel puts in himself among the body of the people, as being a member of it, and as well knowing he was not without sin; and therefore willingly took his part in the blame of it, in confession of it, and confusion for it: even by departing from thy precepts, and from thy judgments; both of a moral and positive nature, which were enjoined by the law of Moses, as the rule of their conduct; but from this they swerved.”
Source
1871
A.D.
1871
“Compare Nehemiah's confession (Neh. 9:1-38). sinned . . . committed iniquity . . . done wickedly . . . rebelled--a climax. Erred in ignorance . . . sinned by infirmity . . . habitually and wilfully done wickedness . . . as open and obstinate rebels set ourselves against God.”
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.