मधुपर्के च यज्ञे च पितृदैवतकर्मणि । अत्रैव पशवो हिंस्या नान्यत्रैत्यब्रवीन् मनुः ॥ ४१ ॥
On offering the honey-mixture (to a guest), at a sacrifice and at the rites in honour of the manes, but on these occasions only, may an animal be slain; that (rule) Manu proclaimed.