Hadith 29:108
Affan narrated to us, he said: Shu'bah narrated to us, he said: Abu Ishaq narrated to us, from al-Muhallab, who said: We raided Manadhir and took spoils from them, and it was as if they had a treaty. So Umar wrote: "Return what you have taken from them." He said: So they returned [the spoils], until they even returned the pregnant women.
حدثنا عفان قال حدثنا شعبة قال حدثنا أبو إسحاق عن المهلب قال أغرنا على مناذر وأصبنا منهم وكأنه كان لهم عهد فكتب عمر ردوا ما أصبتم منهم قال فردوا حتى ردوا النساء الحبالى