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. (Using translation from Abū Dāʾūd 2830)
عَنْ نُبَيْشَةَ الْهُذَلِيِّ قَالَ سَأَلْتُ رَسُولَ اللهِ ﷺ قُلْتُ إِنَّا كُنَّا نَعْتِرُ عَتِيرَةً لَنَا فِي الْجَاهِلِيَّةِ فَمَا تَأْمُرُنَا؟ قَالَ اذْبَحُوا فِي أَيِّ شَهْرٍ مَا كَانَ وَبَرُّوا اللهَ وَأَطْعِمُوا قُلْتُ يَا رَسُولَ اللهِ إِنَّا كُنَّانُفَرِّعُ فَرَعًا فِي الْجَاهِلِيَّةِ فَمَا تَأْمُرُنَا؟ قَالَ فِي كُلِّ سَائِمَةٍ فَرَعٌ تَغْذُوهُ مَاشِيَتُكَ فَإِذَا اسْتَحْمَلَ ذَبَحْتَهُ وَتَصَدَّقْتَ بِلَحْمِهِ قَالَ أَحْسَبُهُ قَالَ عَلَى ابْنِ السَّبِيلِ فَإِنَّ ذَلِكَ خَيْرٌ