The nineteen blessings of the Amidah make up the core of the Jewish prayer service. If we want God to accept our repentance, as mentioned in the fifth blessing, we begin the process immediately in the sixth blessing by asking for forgiveness.
S’lach lanu Avee’nu kee cha’tanu, m’chal lanu Malkaynu kee fa’sha’nu, kee mo’chayl v’so’lay’ach Ah’tah. Ba’ruch Ah’tah Ah’doh’nai, chanun ha’mar’beh lis’lo’ach.
Forgive us, our Father, for we have sinned, pardon us, our King, for we have transgressed; for You pardon and forgive. Blessed are You, Lord, the gracious One who repeatedly forgives.
--Translation reproduced with permission from The Koren Sacks Siddur,
© Koren Publishers Jerusalem Ltd.