And verily, We made the Quran easy for remembering, is there then any one to remember?[54:32]
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).