The Messenger of Allah ﷺ as saying: Along with a boy there is an 'Aqiqah, so shed blood on his behalf, and remove injury from him. (Using translation from Abū Dāʾūd 2839)   

أَنَّ النَّبِيَّ ﷺ قَالَ «وَعَنِ الْغُلَامِ عَقِيقَتُهُ فَأَهْرِيقُوا عَنْهُ دَمًا وَأَمِيطُوا عَنْهُ الْأَذَى»  

"for a boy two sheep, Mukafaatan (of equal age), and for a girl, one sheep." (Using translation from Nasāʾī 4215)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «فِي الْغُلَامِ شَاتَانِ مُكَافَأَتَانِ وَفِي الْجَارِيَةِ شَاةٌ»