Sunan an-Nasa'i, Volume 3, Book 23, Hadith 2613 (DarusSalam) ⓘ
It was narrated from Ihn Abi Rafi, from his father, that: the Messenger of Allah appointed a man from Banu Makhzum to collect Sadaqah. Abu Rafi wanted to go with him, but the Messenger of Allah said: "The Sadaqah is not permissible for us, and the freed slave of a people is one of them."
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ حَدَّثَنَا الْحَكَمُ، عَنِ ابْنِ أَبِي رَافِعٍ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم اسْتَعْمَلَ رَجُلاً مِنْ بَنِي مَخْزُومٍ عَلَى الصَّدَقَةِ فَأَرَادَ أَبُو رَافِعٍ أَنْ يَتْبَعَهُ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّ الصَّدَقَةَ لاَ تَحِلُّ لَنَا وَإِنَّ مَوْلَى الْقَوْمِ مِنْهُمْ " .
also referenced under: Hadith 2612 (Reference) & Book 23, Hadith 0 (In-Book)