"Prohibited to you (For marriage) are:- Your mothers, daughters, sisters; father's sisters, Mother's sisters; brother's daughters, sister's daughters; foster-mothers (Who gave you suck), foster-sisters; your wives' mothers; your step-daughters under your guardianship, born of your wives to whom ye have gone in,- no prohibition if ye have not gone in;- (Those who have been) wives of your sons proceeding from your loins; and two sisters in wedlock at one and the same time, except for what is past; for Allah is Oft-forgiving, Most Merciful;" - Quran 4:23 (read more)

"And he [Muhammad] had their hands and feet cut off. Then he ordered for nails which were heated and passed over their eyes, and whey were left in the Harra (i.e. rocky land in Medina). They asked for water, and nobody provided them with water till they died (Abu Qilaba, a sub-narrator said, 'They committed murder and theft and fought against Allah and His Apostle, and spread evil in the land.')" - Sahih Bukhari 1:3:63 (read more)

"Ibn al-Qasaar and our shaykh said: the Sahaabah agreed that [the person who does homosexual acts] should be killed, but they differed as to how he should be killed. Abu Bakr al-Siddeeq said that he should be thrown down from a cliff. ‘Ali (may Allaah be pleased with him) said that a wall should be made to collapse on him. Ibn ‘Abbaas said, they should be killed by stoning. This shows that there was consensus among them that [the person who does homosexual acts] should be killed, but they differed as to how he should be executed." - Sheikh Muhammed Salih Al-Munajjid