Muhammad ibn AbulMujahid reported Abdullah ibn AbuAwfa as saying: I asked: Did you set aside the fifth of the food in the time of the Messenger of Allah ﷺ? He replied: On the day of Khaybar we captured food and a man would come and take as much food of it as needed and then go away.
قُلْتُ هَلْ كُنْتُمْ تُخَمِّسُونَ يَعْنِي الطَّعَامَ فِي عَهْدِ رَسُولِ اللَّهِ ﷺ فَقَالَ أَصَبْنَا طَعَامًا يَوْمَ خَيْبَرَ فَكَانَ الرَّجُلُ يَجِيءُ فَيَأْخُذُ مِنْهُ مِقْدَارَ مَا يَكْفِيهِ ثُمَّ يَنْصَرِفُ