Abdullah bin Umar reported,

When the Prophet ﷺ returned from Hunayn, Umar asked him about a vow he had made during the days of ignorance to perform itikaf for one day. The Prophet ﷺ instructed him to fulfill it, so Umar set out ahead of him.Umar said, "He sent with me a slave girl who had been part of his share from the captives of Hunayn." When I stopped along the way, I placed her in one of the dwellings of the bedouins. Suddenly I saw the captives of Hunayn rushing out, shouting, "The Messenger of Allah ﷺ has set us free!"Umar then said to Abdullah, "Go and release her."Abdullah said, "So I went and set her free."

حدثنا عبد الرزاق حدثنا معمر عن أيوب عن نافع

عن ابن عمر قال

لما قفل النبي ﷺ من حنين سأل عمر عن نذر كان نذره في الجاهلية اعتكاف يوم فأمر به فانطلق عمر بين يديه قال وبعث معي بجارية كان أصابها يوم حنين قال فجعلتها في بعض بيوت الأعراب حين نزلت فإذا أنا بسبي حنين قد خرجوا يسعون يقولون أعتقنا رسول الله ﷺ قال فقال عمر لعبد الله اذهب فأرسلها قال فذهبت فأرسلتها