"When the circumcised meets the circumcised, then indeed Ghusl is required. Myself and Messenger of Allah did that, so we performed Ghusl."  

إِذَا جَاوَزَ الْخِتَانُ الْخِتَانَ فَقَدْ وَجَبَ الْغُسْلُ فَعَلْتُهُ أَنَا وَرَسُولُ اللَّهِ ﷺ فَاغْتَسَلْنَا قَالَ وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو وَرَافِعِ بْنِ خَدِيجٍ  

the Prophet said: "When the circumcised meets the circumcised then Ghusl is required."  

قَالَ النَّبِيُّ ﷺ إِذَا جَاوَزَ الْخِتَانُ الْخِتَانَ وَجَبَ الْغُسْلُ