A Prayer for Cleansing

O God, thou God of my salvation: and my tongue shall sing aloud of thy righteousness. 15 O Lord, open thou my lips; and my mouth shall shew forth thy praise. 16 For thou desirest not sacrifice; else would I give it: thou delightest not in burnt offering. 17 The sacrifices of God are a broken spirit: a broken and a contrite heart, O God, thou wilt not despise. 18 Do good in thy good pleasure unto Zion: build thou the walls of Jerusalem. 19 Then shalt thou be pleased with the sacrifices of righteousness, with burnt offering and whole burnt offering: then shall they offer bullocks upon thine altar.