Gregory of Nyssa

But to mark her own unworthiness, she stands behind with downcast eyes, and with her hair thrown about embraces His feet, and washing them with her tears, betokened a mind distressed at her state, and imploring pardon. For it follows, And standing behind, she began to wash his feet with her tears.

Catena Aurea by Aquinas ↗

Augustine of Hippo

For I think we must understand that the same Mary did this twice, once indeed as Luke has related, when at first coming with humility and weeping, she was thought worthy to receive forgiveness of sins. Hence John, when he began to speak of the resurrection of Lazarus, before he came to Bethany, says, But it was Mary who anointed our Lord with ointment, and wiped his feet with her hair, whose brother Lazarus was sick. …

Catena Aurea by Aquinas ↗

Gregory the Dialogist

For her eyes which once coveted after earthly things, she was now wearing out with penitential weeping. She once displayed her hair for the setting off of her face, she now wiped her tears with her hair. As it follows, And she wiped them with the hairs of her head. She once uttered proud things with her mouth, but kissing the feet of the Lord, she impressed her lips on the footsteps of her Redeemer. …

Catena Aurea by Aquinas ↗

Bede

And standing behind him at his feet, she began to wet his feet with her tears, and wiped them with the hair of her head. And she kissed his feet and anointed them with the ointment. It is clear to everyone that the woman, previously engaged in illicit acts, had used the ointment for the scent of her own flesh. So what she had previously exhibited shamefully for herself, she was now offering praiseworthily to God. She had coveted earthly things with her eyes, but now, through penitence, she was weeping. …

On the Gospel of Luke ↗