Narrated Salman bin 'Amir Ad-Dabbi:

I heard Allah's Apostle saying, "'Aqiqa is to be offered for a (newly born) boy, so slaughter (an animal) for him, and relieve him of his suffering." (Note: It has been quoted in Fateh-AL-Bari that the majority of the Religious Scholars agrees to the Hadith narrated in Sahih At-TlRMlZY that the Prophet was asked about Aqiqa and he ordered 2 sheep for a boy and one sheep for a girl and that is his tradition "SUNNA".)

وَقَالَ غَيْرُ وَاحِدٍ عَنْ عَاصِمٍ، وَهِشَامٍ، عَنْ حَفْصَةَ بِنْتِ سِيرِينَ، عَنِ الرَّبَابِ، عَنْ سَلْمَانَ، عَنِ النَّبِيِّ ﷺ. وَرَوَاهُ يَزِيدُ بْنُ إِبْرَاهِيمَ عَنِ ابْنِ سِيرِينَ عَنْ سَلْمَانَ قَوْلَهُ. وَقَالَ أَصْبَغُ أَخْبَرَنِي ابْنُ وَهْبٍ عَنْ جَرِيرِ بْنِ حَازِمٍ عَنْ أَيُّوبَ السَّخْتِيَانِيِّ عَنْ مُحَمَّدِ بْنِ سِيرِينَ حَدَّثَنَا سَلْمَانُ بْنُ عَامِرٍ الضَّبِّيُّ قَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ
" مَعَ الْغُلاَمِ عَقِيقَةٌ، فَأَهْرِيقُوا عَنْهُ دَمًا وَأَمِيطُوا عَنْهُ الأَذَى ".