سورة البقرة

Ibn Abbas (may Allah have mercy on him): O Muhammad (peace be upon him and his family)! We have sent you with the truth; it has been said, We sent you with the Quran (what is meant by the truth is the Quran).

The Prophet (peace be upon him and his family): It is narrated from Abul-Aswad: ... Abu Dharr informed me [and said] ... I said to the Prophet (peace be upon him and his family): "O Messenger of Allah (peace be upon him and his family)! May my father and mother be sacrificed for you! Give me a counsel by which Allah will benefit me." The Prophet (peace be upon him and his family) said: "Yes! ... Know that the first worship of Allah is knowing Him. For Allah is the First of all things; He was before everything, and before Him there was nothing; He is the One who has no second; He is Everlasting but without end; the Creator of the earth and the heavens and what is between the earth and the heavens ... [The next stage of worship] after [knowing Allah] is believing in me and acknowledging that Allah the Exalted has sent me to all people as a bearer of good news and a warner."