Ben Sirach 27:30-28:7
New Revised Standard Version,
Anglicised Catholic Edition

Anger and Vengeance

30 Anger and wrath, these also are abominations,
yet a sinner holds on to them.
28 The vengeful will face the Lord’s vengeance,
for he keeps a strict account of[a] their sins.
2 Forgive your neighbour the wrong he has done,
and then your sins will be pardoned when you pray.
3 Does anyone harbour anger against another,
and expect healing from the Lord?
4 If someone has no mercy towards another like himself,
can he then seek pardon for his own sins?
5 If a mere mortal harbours wrath,
who will make an atoning sacrifice for his sins?
6 Remember the end of your life, and set enmity aside;
remember corruption and death, and be true to the commandments.
7 Remember the commandments, and do not be angry with your neighbour;
remember the covenant of the Most High, and overlook faults.