Dantaponasikkhāpada

Vinayapiṭaka · Bhikkhu Vibhaṅga (2) · Vol. 2 · Section 546

[546] There is no offence: if some discerning man is present as a second (companion); if the bhikkhu stands and does not sit; if he is not intent upon privacy; if he sits with his attention directed elsewhere; if the bhikkhu is insane; if he is the first offender (ādikammika). The Fifth Training Rule is finished. __________________ 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English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.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 469 — Saṁvidhānasikkhāpada