Hadith 8:62
‘Abdallah b. ‘Amr b. al-‘As told that the Prophet commanded him to equip an army, but when the camels were insufficient he commanded him to keep back the young camels of the sadaqa , and he was taking a camel to be replaced by two when the camels of the sadaqa came. Abu Dawud transmitted it.
وَعَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَمَرَهُ أَن يُجهِّزَ جَيْشًا فنفدتِ الإِبلُ فأمرَهُ أَن يَأْخُذَ عَلَى قَلَائِصِ الصَّدَقَةِ فَكَانَ يَأْخُذُ الْبَعِيرَ بِالْبَعِيرَيْنِ إِلَى إِبِلِ الصَّدَقَةِ. رَوَاهُ أَبُو دَاوُدَ
Original Reference: Mishkat al-Masabih 2823