كتاب الأيمان
27  
The Book of Oaths
(5)
Chapter: Saying: "If Allah wills" when swearing oaths and at other times
(5)
باب الاِسْتِثْنَاءِ ‏‏
Sahih Muslim 1654 f

This hadith has been narrated on the authority of Abu Zinad with the same chain of transmitters with a variation of (these words):

" Every one of them giving birth to a child, who would have fought in the cause of Allah."
وَحَدَّثَنِيهِ سُوَيْدُ بْنُ سَعِيدٍ، حَدَّثَنَا حَفْصُ بْنُ مَيْسَرَةَ، عَنْ مُوسَى بْنِ عُقْبَةَ، عَنْ أَبِي، الزِّنَادِ بِهَذَا الإِسْنَادِ مِثْلَهُ ‏.‏ غَيْرَ أَنَّهُ قَالَ ‏ "‏ كُلُّهَا تَحْمِلُ غُلاَمًا يُجَاهِدُ فِي سَبِيلِ اللَّهِ ‏"‏‏.‏
Reference : Sahih Muslim 1654f
In-book reference : Book 27, Hadith 37
USC-MSA web (English) reference : Book 15, Hadith 4070
  (deprecated numbering scheme)