It is narrated from Zur on the authority of Ubayy bin Ka'b (may Allah be pleased with him) that once Angel Jibreel (peace be upon him) met the Noble Prophet (peace and blessings be upon him) at the place of "Ahjaz al-Mara". The Noble Prophet (peace and blessings be upon him) said to him: I have been sent to a nation that is unlettered, among whom are extremely old men and women, and slaves as well. So Angel Jibreel (peace be upon him) submitted: Command them that they recite the Noble Qur'an upon seven letters.