2 occurrences across the corpus

OT Pseudepigrapha

The First Book of Adam and Eve 27:14

And the angel said to Adam, "This hideous form has been his ever since God made him fall from heaven. He could not have come near you in it; therefore did he transform himself into an angel of light."

Testament of Dan 2:18

For the very angel of peace shall strengthen Israel, that it fall not into the extremity of evil. 19 And it shall be in the time of the lawlessness of Israel, that the Lord will not depart from them, but will transform them into a nation that doeth His will, for none of the angels will be equal unto him.