Please see the following suttas in relation to forgiveness:

In this sutta, the Buddha doesn’t accept the harm from another. Thus he doesn’t get inflicted to the point that he needs to Forgive.

https://suttacentral.net/sn7.2/en/sujato

And this sutta, number 21 the first section, shows the importance of understanding one’s own mistakes and forgiving others’ mistakes.

https://suttacentral.net/an2.21-31/en/sujato

For more information on how to practice Forgiveness, see

Revised Instructions

Bhante Vimalaramsi created a powerful Forgiveness meditation, which he then practiced himself for two years. On his website you will find free resources and excellent instructions.

Revised Instructions

Bhante Vimalaramsi created a powerful Forgiveness meditation, which he then practiced himself for two years. On his website you will find free resources and excellent instructions.

Revised Instructions