四分律比丘含注戒本 2.105

2.105

If summoned by a senior and one does not come, it is a duṣkṛta. Cases of non-offense: if hard of hearing and one does not understand; if the previous words were confused, so one asks "To whom are you speaking?" up to "I do not see this offense"; if an unlawful or unbeneficial karman is being performed, and in order not to participate in the concord, when summoned to come one does not come; if an unlawful karman is being performed against oneself, or if wishing not to know of it, one is told "Do not come" and then comes; if during a single-sitting meal, or eating without the surplus-food ritual, or when sick, one is called to rise and does not rise; if there are dangers to life, celibacy, etc., and one is told "Do not rise" and then rises; if asked with an evil intent and one does not speak with them; if an unlawful act is performed and one rebukes them; speaking in a low voice; speaking mistakenly—in all such cases there is no offense.