Penitence prayers
Christian prayers of repentance run from the Hebrew Bible to the modern missal, and the range here is deliberately wide. The oldest is Psalm 51, the great penitential psalm, whose superscription ties it to David's repentance after the prophet Nathan confronted him. The Prayer of Manasseh, composed around the 2nd century BC, puts a confession in the mouth of one of Judah's most notorious kings. From the liturgy come the Kyrie, whose Christian form dates to the 4th century AD, the Agnus Dei from around 700 AD, and the Confiteor as codified in the 16th century. The Anglican General Confession entered the Book of Common Prayer in 1552. The Prayer of Ephrem the Syrian, said with prostrations throughout Orthodox Lent, is 4th century. These prayers name wrongdoing plainly and ask for mercy. None of them minimize it.