Some charity was sent to Sayyidah Umm Kulthum bint Ali (may Allah be pleased with her), and she said: A freed slave of ours, who was called Kaysan - or Hurmuz - told me that he passed by the Prophet (peace and blessings be upon him). He said: He (peace and blessings be upon him) called me, so I came, and he (peace and blessings be upon him) said: "O so-and-so, taking charity has been made unlawful for us, the Ahl al-Bayt, and the freed slave of a people is counted among them, so do not eat charity."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17962