Abdullah bin Umar reported that Umar bin Khattab asked the Messenger of Allah ﷺ as he was at jirana (a town near Makkah) on his way back from Taif: Messenger of Allah, I had taken a vow during the days of Ignorance that I would observe Itikaf for one day in the Sacred Mosque. So what is your opinion? He said: Go and observe Itikaf for a day. And Allahs Messenger ﷺ gave him a slave girl out of the one-fifth (of the spoils of war meant for the Holy Prophet). And when Allahs Messenger ﷺ set the war prisoners free, Umar bin Khattab heard their voice as they were saying: Allahs Messenger ﷺ has set us free. He (Hadrat Umar) said: What is this? They said: Allahs Messenger ﷺ has set free the prisoners of war (which had fallen to the lot of people). Thereupon he (Hadrat Umar) said:Abdullah, go to that slave-girl and set her free.