Augustine of Hippo

What ails thee, Peter, thy voice is suddenly changed? That mouth full of faith and love, is turned to hatred and unbelief. Not yet awhile is the scourge applied, not yet the instruments of torture. Thy interrogator is no one of authority, who might cause alarm to the confessor. The mere voice of a woman asks the question, and she perhaps not about to divulge thy confession, nor yet a woman, but a door-keeper, a mean slave.

Catena Aurea by Aquinas ↗

Ambrose of Milan

What meaneth it, that a maid is the first to betray Peter, whereas surely men ought the more easily to have recognised him, save that that sex should be plainly implicated in our Lord's murder, in order that it might also be redeemed by His Passion? But Peter when discovered denies, for better that Peter should have denied, than our Lord's word should have failed. Hence it follows, And he denied, saying, Woman, I know him not.

Catena Aurea by Aquinas ↗

Bede

When a certain servant girl saw him sitting in the light and looked closely at him, she said, "This man was also with him." Why is it that the servant girl is the first to betray him, when surely men could have recognized him more clearly, except that this gender also should appear to have sinned in the death of the Lord, and this gender should be redeemed by the Lord's passion? Therefore, a woman first received the mystery of the resurrection and kept the command, to abolish the old error of transgression.

On the Gospel of Luke ↗