"Also (forbidden are) women already married, except those whom your right hands possess. Thus has Allah ordained for you. All others are lawful, provided you seek them from your property, desiring chastity, not fornication. So with those among them whom you have enjoyed, give them their required due, but if you agree mutually after the requirement (has been determined), there is no sin on you. Surely, Allah is Ever All-Knowing, All-Wise." - Quran 4:24 (read more)

"O Allah's Apostle! We asked you for mounts, but you took an oath that you would not give us any mounts; we think that you have forgotten your oath.' He said, 'It is Allah Who has given you mounts. By Allah, and Allah willing, if I take an oath and later find something else better than that. then I do what is better and expiate my oath.'" - Sahih Bukhari 7:67:427 (read more)

"Other scholars said Q. 2:256 has not been abrogated, but it had a special application. It was revealed concerning the people of the Book [the Jews and the Christians]; they can not be compelled to embrace Islam if they pay the Jizia (that is head tax on free non-Muslims under Muslim rule). It is only the idol worshippers who are compelled to embrace Islam and upon them Q. 9:73 applies ['O Prophet, struggle with the unbelievers and hypocrites, and be thou harsh with them.']. This is the opinion of Ibn 'Abbas which is the best opinion due to the authenticity of its chain of authority." - Al-Nahas