"Every boy is in pledge for his 'Aqiqah, so slaughter (the animal) for him on the seventh day, and shave his head, and a name" (Using translation from Nasāʾī 4220)
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «الْغُلَامُ مُرْتَهَنٌ بِعَقِيقَتِهِ تُذْبَحُ عَنْهُ يَوْمَ سَابِعِهِ وَيُحْلَقُ رَأْسُهُ وَيُسَمَّى يَوْمَ السَّابِعِ» صحيح