’Abdullah bin Abi Aufa (RAA) narrated, ‘On the Day of Khaibar, we got some food (as spoils). The man would come and take as much as he needed and then go away.’ Related by Abu Dawud.Ibn al-Garud and Al-Hakim graded it as Sahih.

وَعَنْ عَبْدِ اَللَّهِ بْنِ أَبِي أَوْفَى رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: { أَصَبْنَا طَعَاماً يَوْمَ خَيْبَرَ, فَكَانَ اَلرَّجُلُ يَجِيءُ, فَيَأْخُذُ مِنْهُ مِقْدَارَ مَا يَكْفِيهِ, ثُمَّ يَنْصَرِفُ } أَخْرَجَهُ أَبُو دَاوُدَ, وَصَحَّحَهُ ابْنُ اَلْجَارُودِ, وَالْحَاكِمُ [1]‏ .‏