The Book of Faith (Kitab Al-Iman)
Muslim :: Book 1 : Hadith 49
It is narrated on the authority of Aswad b. Hilal that he heard Mu'adh say this: The Messenger of Allah (may peace be upon him) called, me and I replied to him. He (the Holy Prophet) said: Do you know the right of Allah upon the people? and then followed the hadith (mentioned above).
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