Sunan Abi Dawud 2830
Sacrifice (Kitab Al-Dahaya)
Regarding Al-'Atirah
Narrated Nubayshah: A man called the Messenger of Allah (ﷺ): We used to sacrifice Atirah in pre-Islamic days during Rajab; so what do you command us? He said: Sacrifice for the sake of Allah in any month whatever; obey Allah, Most High, and feed(the people). He said: We used to sacrifice a Fara' in pre-Islamic days, so what do you command us? He said: On every pasturing animal there is a Fara' which is fed by your cattle till it becomes strong and capable of carrying load. The narrator Nasr said (in his version): When it becomes capable of carrying load of the pilgrims, you may slaughter it and give its meat as charity (sadaqah). The narrator Khalid's version says: You (may give it) to the travellers, for it is better. Khalid said: I asked AbuQilabah: How many pasturing animals? He replied: One hundred.