1 Peter 1:12

Irenaeus Against Heresies Book II

Admirable sophists, and explorers of the sublimities of the unknown Father, and rehearsers of those super-celestial mysteries "which the angels desire to look into!"[94]

Irenaeus Against Heresies Book IV

For He has brought Himself, and has bestowed on men those good things which were announced beforehand, which things the angels desired to look into.[544]

Irenaeus Against Heresies Book V

For there is the one Son, who accomplished His Father's will; and one human race also in which the mysteries of God are wrought, "which the angels desire to look into; "[347]

Clement of Alexandria Who is the Rich Man that Shall Be Saved?

of ineffable and unutterable blessings, which eye hath not seen, nor ear heard, nor have entered into the heart of men; into which angels desire to look, and see what good things God hath prepared for the saints and the children who love Him."[30]

Origen Commentary on Matthew Book X

hat the men who are saved in Christ are superior even to the holy angels; for how can those who are cast by the holy angels into vessels be compared with those who cast them into vessels, seeing that they have been put under the authority of the angels? While we say this, we are not ignorant that the men who will be saved in Christ surpass some angels-namely, those who have not been entrusted with this office-but not all of them. For we read, "Which things angels desire to look into,"[57]