Al-Adab Al-Mufrad #1254
Circumcision
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
حَدَّثَنَا مُحَمَّدٌ، قَالَ: أَخْبَرَنَا عَبْدُ اللهِ، قَالَ: أَخْبَرَنَا مُعْتَمِرٌ قَالَ: حَدَّثَنِي سَالِمُ بْنُ أَبِي الذَّيَّالِ، وَكَانَ صَاحِبَ حَدِيثٍ، قَالَ: سَمِعْتُ الْحَسَنَ يَقُولُ: أَمَا تَعْجَبُونَ لِهَذَا؟ يَعْنِي: مَالِكَ بْنَ الْمُنْذِرِ عَمَدَ إِلَى شُيُوخٍ مِنْ أَهْلِ كَسْكَرَ أَسْلَمُوا، فَفَتَّشَهُمْ فَأَمَرَ بِهِمْ فَخُتِنُوا، وَهَذَا الشِّتَاءُ، فَبَلَغَنِي أَنَّ بَعْضَهُمْ مَاتَ، وَلَقَدْ أَسْلَمَ مَعَ رَسُولِ اللهِ صلى الله عليه وسلم الرُّومِيُّ وَالْحَبَشِيُّ فَمَا فُتِّشُوا عَنْ شَيْءٍ.
It is reported that al-Hasan said, "Are you not astonished by
this man? (i.e. Malik ibn al-Mundhir) He went to some of the old people
of Kaskar who had become Muslim and examined them and then commanded that
they be circumcised although it was winter. I heard that some of them died.
Greeks and Abyssinians became Muslim with the Messenger of Allah, may Allah
bless him and grant him peace, and they were not examined at all."
About Al-Adab Al-Mufrad
This hadith is #1254 from Al-Adab Al-Mufrad, in the Book of Circumcision.