The Sermon on the Mount covers three chapters in Matthew’s Gospel. There are some long narrative teachings, like the Beatitudes. And there are some that are abruptly short, like this one:
Listen to what the Lord says to us:
If you forgive (others) their transgressions,
your heavenly Father will forgive you.
But if you do not forgive (others),
neither will your Father forgive your transgressions.
Another variation on the divine theme that God desires mercy from his children.
This short passage, one of four from the Sermon on the Mount to be found in the Reconciliation Lectionary, is buried in the Rite at number 74 as a suggested reading for form I, reconciliation with a single penitent.
It seems more likely a confessor will chide a penitent for being unforgiving rather than a whole community. I suppose whole communities might need that from time to time, though.
Either way, it’s a good short passage. Probably perfect for form I. And Lent. Anybody ever have a confessor use this?