Saṁvidhānasikkhāpada

Vinayapiṭaka · Bhikkhu Vibhaṅga (2) · Vol. 2 · Section 702

[702] There is no offence (anāpatti) when a bhikkhu, being harassed by anyone, raises the palm as a weapon (talasattika) desiring to free himself; for one who is insane; for the first offender (ādikammika). The Fifth Training Rule is concluded. _____________ The Sixth Training Rule

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 2 · Section 718 — Sahadhammikasikkhāpada