"A man called out to the Prophet and said: 'We used to sacrifice the 'Atirah - i.e., during the Jahiliyyah - in Rajab; what do you command us to do?' He said: 'Sacrifice, whatever month it is, do good for the sake of Allah, the Mighty and Sublime, and feed (the poor).' He said: 'We used to sacrifice the Fara' during the Jahiliyyah; what do you command us to do?' He said: 'For every flock of grazing animals, feed the firstborn as you feed the rest of your flock until it reaches an age where it could be used to carry loads, then sacrifice it, and give its meat in charity, for that is good."' (Using translation from Nasāʾī 4231)  

نَادَى النَّبِيَّ ﷺ رَجُلٌ فَقَالَ إِنَّا كُنَّا نَعْتِرُ عَتِيرَةً يَعْنِي فِي الْجَاهِلِيَّةِ فِي رَجَبٍ فَمَا تَأْمُرُنَا؟ قَالَ «اذْبَحُوا لَهُ فِي أَيِّ شَهْرٍ مَا كَانَ وَبَرُّوا اللهَ وَأَطْعِمُوا» قَالَ إِنَّا كُنَّا نُفَرِّعُ فَرَعًا فِي الْجَاهِلِيَّةِ قَالَ «فِي كُلِّ سَائِمَةٍ فَرَعٌ حَتَّى إِذَا اسْتَحْمَلَ ذَبَحْتَهُ وَتَصَدَّقْتَ بِلَحْمِهِ فَإِنَّ ذَلِكَ هُوَ خَيْرٌ»  

[Machine] A man said, "O Messenger of Allah, we used to observe Ateerah in the pre-Islamic period, so what do you command us?" He said, "Sacrifice for Allah in any month, it does not matter which month it is, and maintain good relations with Allah and give food (to the needy)."  

قَالَ رَجُلٌ يَا رَسُولَ اللهِ إِنَّا كُنَّا نَعْتِرُ عَتِيرَةً فِي الْجَاهِلِيَّةِ فَمَا تَأْمُرُنَا؟ قَالَ «اذْبَحُوا لِلَّهِ فِي أَيِّ شَهْرٍ مَا كَانَ وَبَرُّوا اللهَ وَأَطْعِمُوا»  

"I said: 'O Messenger of Allah, we used to offer sacrifices during the Jahiliyyah in Rajab, and eat of (their meat) and offer some to those who came to us.' The Messenger of Allah said: 'There is nothing wrong with that."' (One of the narrators) Waki bin 'Udus said: "I will not leave it." (Using translation from Nasāʾī 4233)  

قُلْتُ يَا رَسُولَ اللهِ إِنَّا كُنَّا نَذْبَحُ ذَبَائِحَ فِي الْجَاهِلِيَّةِ فِي رَجَبٍ فَنَأْكُلُ وَنُطْعِمُ مَنْ جَاءَنَا فَقَالَ رَسُولُ اللهِ ﷺ «لَا بَأْسَ بِهِ» قَالَ وَكِيعُ بْنُ عُدُسٍ فَلَا أَدَعُهُ