Uttarajjhayana 128.1.24

128.1.24

12 akkosejjā pare bhikkhuṃ | na tesiṃ paḍisaṃjale /
sariso hoi bālāṇaṃ | tamhā bhikkhū na saṃjale ||24||

If a layman abuses a monk, he should not grow angry against him; because he would be like a child, a monk should not grow angry. (24)
If a monk hears bad words, cruel and rankling ones, he should silently overlook them, and not take them to heart. (25)