The Messenger of Allah ﷺ said, "When the collector of zakat comes to you, let him not depart except pleased."
قال رسول الله ﷺ: إذا جاءكم المصدق فلا يصدر إلا وهو راض.
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Tabarani narrated it in al-Awsat (5803) from Muhammad bin Abdullah Hadrami, who said, Muhammad bin Tarif Bajali told us, who said, Muhammad bin Fudayl told us, from Asim Ahwal, from Abu Uthman Nahdi, from Abu Hurairah, and he related it. Tabarani said, "No one narrated this hadith from Asim except Muhammad bin Fudayl, and Muhammad bin Tarif narrated it alone, and it is not narrated from Abu Hurairah except by this chain."I say, its chain is hasan because of Muhammad bin Tarif, for he is "truthful" as stated in Taqrib, and Ibn Saad deemed him reliable, and Ibn Hibban mentioned him in Thiqat. Abu Zura said, "His standing is one of truthfulness." So his being the sole narrator does not harm it. Through his route, Bayhaqi narrated it (4/137) and remained silent about it, and Haythami also graded it hasan in Majma (3/79), except that Daraqutni in Ilal (11/217) preferred the view that it is a mursal narration from Abu Uthman Nahdi.On this subject there is also a narration from Jabir bin Utayk, that the Messenger of Allah ﷺ said, "There will come to you disliked riders. If they come to you, welcome them and leave them to what they seek. If they act justly, it is for their own benefit, and if they act unjustly, it is against themselves. Satisfy them, for the completeness of your zakat is their satisfaction, and let them pray for you."Abu Dawud narrated it (1588) from Abbas bin Abdul-Azim and Muhammad bin Muthanna, who both said, Bishr bin Umar told us, from Abu al-Ghusn, from Sakhr bin Ishaq, from Abdul-Rahman bin Jabir bin Utayk, from his father, and he related it. Sakhr bin Abdul-Rahman and his teacher Abdul-Rahman bin Jabir are both "unknown."As for what is narrated from Bashir bin Khassasiya, who said, "We said, 'The collectors of zakat treat us unjustly, so shall we withhold from our wealth an amount equal to what they take unjustly from us?' He said, 'No.'" This too contains an unknown man.Abu Dawud narrated it (1586) from Mahdi bin Hafs and Muhammad bin Ubayd, with the same meaning, who both said, Hammad told us, from Ayub, from a man called Daysam, and Ibn Ubayd said, "from Banu Sadus," from Bashir bin Khassasiya, and he related it. Abu Dawud said, Hasan bin Ali and Yahya bin Musa told us, who both said, Abdul-Razzaq told us, from Mamar, from Ayub, with his chain and meaning, except that he said, "We said, 'O Messenger of Allah, the collectors of zakat treat us unjustly.'" Abu Dawud said, "Abdul-Razzaq narrated it as a raised report from Mamar."That is to say, Daysam did not narrate it as a raised report, but rather narrated it as a stopped report attributed to Bashir bin Khassasiya, except that in both their chains there is a man called Daysam whose identity is unknown, and yet Ibn Hibban mentioned him in Thiqat, and this is evidence for the practice of validating unknown narrators.