´Bahz bin Hakim narrated from his father, from his grandfather who said:` "When something was brought to him, the Messenger of Allah would ask: 'Is this charity or a gift?' If they said: 'Charity.' He would not eat it, and if they said, 'A gift' he would eat it."
Hadith Referenceسنن ترمذي / كتاب الزكاة عن رسول الله صلى الله عليه وسلم / 656
´Abu Rafi (may Allah be pleased with him) narrated that :` the Messenger of Allah sent a man from Banu Makhzun to collect charity, so he said to Abu Rafi: "Accompany me so that perhaps you may have some of it." So he said: "Not until I ask the Messenger of Allah." So he went to the Prophet to ask him, and he said: "Charity is not lawful for us, and to be the Mawda of a people to be the same as them."
Hadith Referenceسنن ترمذي / كتاب الزكاة عن رسول الله صلى الله عليه وسلم / 657