"...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 Anas bin Malik: While we were sitting with the Prophet in the mosque, a man came riding on a camel. He made his camel kneel down in the mosque, tied its foreleg and then said: "Who amongst you is Muhammad?" At that time the Prophet was sitting amongst us (his companions) leaning on his arm. We replied, "This white man reclining on his arm." They then addressed him" - Sahih Bukhari 1:3:63 (read more)

"The person who knows the truth and believes in it, then turns his back on it, does not deserve to live. The punishment for apostasy is prescribed for the protection of the religion and as a deterrent to anyone who is thinking of leaving Islaam. There is no doubt that such a serious crime must be met with an equally weighty punishment. If the kuffaar do not give people the freedom to cross a red light, how can we give freedom to people to leave Islaam and disbelieve in Allaah when they want to?" - Sheikh Muhammed Salih Al-Munajjid