[Machine] The prayer of a man who has not been circumcised is not accepted, which indicates that it was obligatory and that his saying "circumcision is a sunnah" means the recommended sunnah of the Prophet ﷺ, and the best evidence for this matter is what
لَا تُقْبَلُ صَلَاةُ رَجُلٍ لَمْ يَخْتَتِنْ وَهَذَا يَدُلُّ عَلَى أَنَّهُ كَانَ يُوجِبُهُ وَأَنَّ قَوْلَهُ الْخِتَانُ سُنَّةٌ أَرَادَ بِهِ سُنَّةَ النَّبِيِّ ﷺ الْمُوجِبَةَ وَأَحْسَنُ مَا يُسْتَدَلُّ بِهِ فِي هَذِهِ الْمَسْأَلَةِ مَا