Its the part of a liturgical service where the whole congregation invokes forgiveness together as recited below.
DIVINE SERVICE
Setting One
151
CONFESSION AND ABSOLUTION
A HYMN OF INVOCATION
may be sung.
Stand
The sign of the cross may be made by all in remembrance of their Baptism.
Pastor
In the name of the Father and of the Son and of the Holy Spirit.
Congregation
Amen.
Matthew 28:19b; [18:20]
Pastor
If we say we have no sin, we deceive ourselves, and the truth is not in us.
Congregation
But if we confess our sins, God, who is faithful and just, will forgive our
sins and cleanse us from all unrighteousness.
1 John 1:8–9
Kneel/Stand
Silence for reflection on God’s Word and for self-examination.
Pastor
Let us then confess our sins to God our Father.
Congregation
Most merciful God, we confess that we are by nature sinful and unclean. We
have sinned against You in thought, word, and deed, by what we have done
and by what we have left undone. We have not loved You with our whole
heart; we have not loved our neighbors as ourselves. We justly deserve Your
present and eternal punishment. For the sake of Your Son, Jesus Christ, have
mercy on us. Forgive us, renew us, and lead us, so that we may delight in
Your will and walk in Your ways to the glory of Your holy name. Amen.
Pastor
Almighty God in His mercy has
given His Son to die for you and
for His sake forgives you all your
sins. As a called and ordained
servant of Christ, and by His
authority, I therefore forgive you
all your sins in the name of the
Father and of the Son and of
the Holy Spirit.
[John 20:19–23]
Congregation
Amen.
Hope this helps