Sahih
Muslim
صحيح مسلم
16
The Book of Marriage
كتاب النكاح
Chapter 3: Mut'ah Marriage: It was permitted then abrograted, then permitted then abrogated, and it will remain Forbidden until the day of resurrection
باب نِكَاحِ الْمُتْعَةِ وَبَيَانِ أَنَّهُ أُبِيحَ ثُمَّ نُسِخَ ثُمَّ أُبِيحَ ثُمَّ نُسِخَ وَاسْتَقَرَّ تَحْرِيمُهُ إِلَى يَوْمِ الْقِيَامَةِ
Sahih Muslim 1404 c
This hadith has been narrated on the authority of Isma'il with the same chain of transmitters (and the words are)
" We were young, so we said: Allah's Messenger, should we not have ourselves castrated? But he (the narrator) did not say; We were on an expedition."وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا وَكِيعٌ، عَنْ إِسْمَاعِيلَ، بِهَذَا الإِسْنَادِ قَالَ كُنَّا وَنَحْنُ شَبَابٌ فَقُلْنَا يَا رَسُولَ اللَّهِ أَلاَ نَسْتَخْصِي وَلَمْ يَقُلْ نَغْزُو .
Grade: Sahih