Hadith 3180
´It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) came to a man from among the Ansar who had picked up a knife to slaughter an animal for the Messenger of Allah (ﷺ). The Messenger of Allah (ﷺ) said to him:` “Avoid those that are lactating.” (i.e. those from which milk is received).
Hadith 3181
´Abu Hurairah narrated that Abu Bakr bin Abu Quhafah narrated that the Messenger of Allah (ﷺ) said to him and to ‘Umar:` “Let us go out to Waqifi.” He said: “So we went out in the moonlight until we came to the garden and he (the owner of the garden) said: ‘Welcome.’ Then he took up the knife and went among the sheep (to choose one for slaughter), and the Messenger of Allah (ﷺ) said: ‘Avoid those that are lactating.’”