Kabbalah sa Mga Awit 25:1: Sha'arei Kedusha

This is particularly so when you confess your sins before Him after the Amidah prayer, or if you say the blessing, “Who listens to prayer” of the Amidah prayer with all your heart, with the resolve to never revert to sin. For HaShem-יהו"ה knows all hidden and revealed matters. He beholds the kidneys and the heart. Likewise, during the Nefilat Apayim prayer, when you reach the verse,²⁶⁴Psalms 25:1 “HaShem-יהו"ה, I give my soul over to You,” resolve with all your heart to sacrifice yourself unto death, if necessary, for the sake of HaShem’s-יהו"ה Torah and mitzvot. On condition that your mouth and heart are truly one, all your sins will be forgiven.