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." (Using translation from Nasāʾī 2612)
أَنَّ رَسُولَ اللهِ ﷺ اسْتَعْمَلَ رَجُلًا مِنْ بَنِي مَخْزُومٍ عَلَى الصَّدَقَةِ فَأَرَادَ أَبُو رَافِعٍ أَنْ يَتْبَعَهُ فَقَالَ رَسُولُ اللهِ ﷺ «إِنَّ الصَّدَقَةَ لَا تَحِلُّ لَنَا وَإِنَّ مَوَالِي الْقَوْمِ مِنْهُمْ»