חָנֵּ֣נִי אֱלֹהִ֣ים כְּחַסְדֶּ֑ךָ כְּרֹ֥ב רַ֝חֲמֶ֗יךָ מְחֵ֣ה פְשָׁעָֽי׃
Be gracious unto me, O God, according to Thy mercy; According to the multitude of Thy compassions blot out my transgressions.
Read halakhic rulings (Jewish law) on Psalms 51:3: and classical halakhic sources.