[13].Surah Ar-Ra'd [The Thunder] : Ayat 42-43

Ayat 42. And verily, those before them did devise plots, but all planning is Allah's. He knows what every person earns, and the disbelievers will know who gets the good end (final destination).

Ayat 43. And those who disbelieve, say: "You (O Muhammad  [SAWW](PBUH)) are not a Messenger." Say: "Sufficient for a witness between me and you is Allah and those too who have knowledge of the Scripture (such as 'Abdullah bin Salam and other Jews and Christians who embraced Islam)."  

Hazrat Abu Musa Al-Ash`ari (May Allah be pleased with him) reported: The Messenger of Allah  [SAWW](PBUH) said, "Three kinds of people will have a double reward: A man from the People of the Book who believes in his Prophet and (also) believes in Muhammad; a slave who discharges properly the duties towards Allah and towards his master; and a man who possesses a slave-girl and teaches her manners, educates her well, and frees her and then marries her.''

[Al-Bukhari Book 04, Chapter 55, Hadith # 655]. 

Lesson : as mentioned above in Surah Ar-Ra'd Ayat 43. ""Sufficient for a witness between me and you is Allah and those too who have knowledge of the Scripture."

1. Ahlul-Kitab means the people of the Scriptures, that is the Jews and the Christians. This Hadith has an inducement for them that if they embrace Islam, they will be entitled to a double reward.

2. Similarly, a sincere and well-wishing slave will also be entitled to a double reward because, on the one side, he obeys his master and bears all the trouble that is involved in his obedience, and on the other side, he also does justice to the worship of Allah.

3. Muslims have been enjoined to impart proper education and training to their slaves, especially their slave-girls. In the latter case, they have been advised to liberate and marry them with all the essentials of marriage. That is, they should be given a dower and all other rights to which wives are entitled. There is a double reward for all these types of people.