Majma al-Zawaid — Hadith 16906

Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates: I was walking with the Prophet (peace and blessings be upon him) somewhere in Madinah, and he (peace and blessings be upon him) said to me: "O Abu Hurayrah!" I said: "O Messenger of Allah, here I am at your service." The Prophet (peace and blessings be upon him) said: "Those who have an abundance of wealth (in this world) will be those with little on the Day of Resurrection, except for the person who does with his wealth like this and like this (that is, spends it in the way of Allah)." The Prophet (peace and blessings be upon him) said this while pointing with his blessed hand to his right and to his left: "And such people are few." Then he (peace and blessings be upon him) said: "O Abu Hurayrah, shall I not guide you to one of the treasures of Paradise?" I said: "Yes indeed, O Messenger of Allah!" The Prophet (peace and blessings be upon him) said: "(Saying) 'La hawla wa la quwwata illa billah, wa la manja min Allahi illa ilayh' (There is no power except with the help of Allah Almighty, and before Allah Almighty refuge can be sought only with Him)." The Prophet (peace and blessings be upon him) said: "O Abu Hurayrah, do you know what the right of Allah Almighty upon His servants is, and what the right of the servants upon Allah Almighty is?" I said: "Allah Almighty and His Messenger know best." The Prophet (peace and blessings be upon him) said: "The right of Allah Almighty upon His servants is that they worship Him and do not associate anyone with Him as a partner, and the right of the servants upon Allah Almighty is that He does not punish anyone who does not associate anyone with Him as a partner."
Al-Bazzar recorded it in this lengthy form and also in an abridged form; the narrators of both are the narrators of the Sahih, except for Kumayl bin Ziyad, and he is thiqah (trustworthy).