Sahih Muslim Book - 32, Hadith - 4519

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى التَّمِيمِىُّ حَدَّثَنَا سُلَيْمُ بْنُ أَخْضَرَ عَنِ ابْنِ عَوْنٍ قَالَ كَتَبْتُ إِلَى نَافِعٍ أَسْأَلُهُ عَنِ الدُّعَاءِ قَبْلَ الْقِتَالِ قَالَ فَكَتَبَ إِلَىَّ إِنَّمَا كَانَ ذَلِكَ فِى أَوَّلِ الإِسْلاَمِ قَدْ أَغَارَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- عَلَى بَنِى الْمُصْطَلِقِ وَهُمْ غَارُّونَ وَأَنْعَامُهُمْ تُسْقَى عَلَى الْمَاءِ فَقَتَلَ مُقَاتِلَتَهُمْ وَسَبَى سَبْيَهُمْ وَأَصَابَ يَوْمَئِذٍ - قَالَ يَحْيَى أَحْسِبُهُ قَالَ - جُوَيْرِيَةَ - أَوْ قَالَ الْبَتَّةَ - ابْنَةَ الْحَارِثِ وَحَدَّثَنِى هَذَا الْحَدِيثَ عَبْدُ اللَّهِ بْنُ عُمَرَ وَكَانَ فِى ذَاكَ الْجَيْشِ.

It was narrated that Ibn 'Awn said: I wrote to Nafi' asking him about calling people (to Islam) before fighting. He wrote back to me (saying): That was only at the beginning of Islam. The Messenger of Allah (s.a.w) raided Banu Al-Mustaliq when they were unaware, and their cattle were drinking at the water. He killed their warriors and took their women and children captive. On that day - Yahya said: I think he said- Juwayriyah, the daughter of Al-Harith, fell to his lot. He said: And 'Abdullah bin 'Umar narrated this Hadith to me, and he was one of that army.