The interpretation timeline
Luke 12:9 Douay-Rheims

But he that shall deny me before men, shall be denied before the angels of God.

A.D. 339 – 1771 2 witnesses

Patristic

before A.D. 750
339
A.D.
c. A.D. 260–339
“But what will be more glorious than to have the only-begotten Word of God Himself to bear witness in our behalf at the divine judgment, and by His own love to draw forth as a recompense for confession, a declaration upon that soul to whom He bears witness, For not as abiding without him to whom He bears witness, but as dwelling in him and filling him with light, He will give His testimony. But having confirmed them with good hope by so great promises, He again rouses them by more alarming threats, saying, But he that denieth me before men, shall be denied before the Angels of God.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“But he that denieth me before men,.... That is, that continues to deny Christ, and lives and dies a denier of him; for otherwise it is possible for a person to deny Jesus to be the Son of God, or the Messiah, and afterwards confess him, as a Pagan or Jew; and through temptation, a real Christian may be left for a while, in one shape or another, to deny him and his truths, and afterwards truly repent, and at last be saved, as Peter; but they that deny Christ publicly, and persist in it, shall be denied before the angels of God: they will be denied by Christ as belonging to him; they will be denied admission into heaven; they will be covered with shame and confusion publicly; they will be sent into everlasting burnings, and be ever tormented with fire and brimstone, in the presence of the holy angels.”
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.