Sayyiduna Jarir (may Allah be pleased with him) said: "I pledged allegiance to the Messenger of Allah (peace and blessings be upon him) on testifying that there is no god worthy of worship except Allah and that Muhammad (peace and blessings be upon him) is His servant and Messenger, and on hearing and obeying, establishing the prayer, paying the zakah, and acting sincerely towards every Muslim."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2338
It is narrated from Sayyiduna Jarir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When the zakah collector comes to you, let him leave you only while he is pleased."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2339
Sayyiduna Jarir (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "Allah shows mercy only to those of His servants who are merciful."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2340