'Confessing' in the Bible

please let Your ear be attentive and Your eyes open to hear the prayer of Your servant which I am praying before You, day and night, on behalf of Your servants, the sons (descendants) of Israel (Jacob), confessing the sins of the sons of Israel which we have committed against You; I and my father’s house have sinned.

For it will be pleasant if you keep them in mind [incorporating them as guiding principles];Let them be ready on your lips [to guide and strengthen yourself and others].

While I was still speaking and praying, and confessing my sin and the sin of my people Israel, and presenting my supplication before the Lord my God in behalf of the holy mountain of my God,