Jami` at-Tirmidhi 1512
جامع الترمذي#1512Sahihحَدَّثَنَا مَحْمُودُ بْنُ غَيْلاَنَ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنِ ابْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ فَرَعَ وَلاَ عَتِيرَةَ " . وَالْفَرَعُ أَوَّلُ النِّتَاجِ كَانَ يُنْتَجُ لَهُمْ فَيَذْبَحُونَهُ . قَالَ وَفِي الْبَابِ عَنْ نُبَيْشَةَ وَمِخْنَفِ بْنِ سُلَيْمٍ وَأَبِي الْعُشَرَاءِ عَنْ أَبِيهِ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ . وَالْعَتِيرَةُ ذَبِيحَةٌ كَانُوا يَذْبَحُونَهَا فِي رَجَبٍ يُعَظِّمُونَ شَهْرَ رَجَبٍ لأَنَّهُ أَوَّلُ شَهْرٍ مِنْ أَشْهُرِ الْحُرُمِ وَأَشْهُرُ الْحُرُمِ رَجَبٌ وَذُو الْقَعْدَةِ وَذُو الْحِجَّةِ وَالْمُحَرَّمُ وَأَشْهُرُ الْحَجِّ شَوَّالٌ وَذُو الْقَعْدَةِ وَعَشْرٌ مِنْ ذِي الْحِجَّةِ كَذَلِكَ رُوِيَ عَنْ بَعْضِ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم وَغَيْرِهِمْ فِي أَشْهُرِ الْحَجِّ.
Narrated Abu Hurairah:That the Messenger of Allah (ﷺ) said: "There is no Fara' or 'Atirah." The Fara' is the first of the offspring that would be born to them, so they would slaughter it. The 'Atirah was an animal that they would slaughter during Rajab to honor the month of Rajab, since it was the first of the sacred months
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 19:23