Narrated Abu Huraira (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) said: Every prophet was given such and such miracles that (upon seeing them) people believed in them, (but) their effect did not remain (in later times). And the miracle that was given to me is the revelation (the Qur'an) which Allah has sent down to me. (Its effect will remain until the Day of Resurrection.) Therefore, I hope that on the Day of Resurrection, my followers will be more than the followers of other prophets.

Sayyiduna Abu Musa (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "There are three persons for whom there is a double reward. One who is from the People of the Book and believes in his own prophet and in Muhammad (peace and blessings be upon him). The second is a slave who fulfills the rights of both his master and Allah. And the third is a man who has a slave-girl, trains her well, teaches her well, then sets her free and marries her; for him there is a double reward."