"...If the party liable is mentally deficient, or weak, or unable Himself to dictate, Let his guardian dictate faithfully, and get two witnesses, out of your own men, and if there are not two men, then a man and two women, such as ye choose, for witnesses, so that if one of them errs, the other can remind her. The witnesses should not refuse when they are called on (For evidence)." - Quran 2:282 (read more)

"Narrated by Gaber bin Abdullah: We were with the messenger of Allah, PBUH and he asked for a drink. One of his men said: "Oh Messenger of Allah, Can we offer you wine to drink?" He said Yes. He (Gaber) went out looking for the drink and came back with a cup of wine. The messenger (PBUH) asked:”Have you fermented it, even with one piece of ferment?” He (Gaber) said "yes" and he (Muhammad) drank." - Sahih Muslim 3753 (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