John Gill Commentary Psalms 130:2

"Lord, hear my voice: Let thine ears be attentive To the voice of my supplications." — Psalms 130:2 (ASV)

Lord, hear my voice
His prayer, which was vocal.

God is a God hearing prayer. Sometimes his people think he does not hear them, but he always does, and in his own time answers.

For to hear prayer with him is to answer it. He does this likewise in his own way as well as time, and not always in the way and at the time his people would have him.

let thine ears be attentive to the voice of my supplications ;
His prayers are put up in an humble suppliant manner, for grace and mercy, not pleading merit and righteousness.

These he desires God would hearken to and hear, listen unto, bow and incline his ears, as he is sometimes said to do.

This is a wonderful instance of his condescension.