"There is no compulsion in religion. Truth stands out clearly from falsehood; whoever rejects evil and believes in God has grasped the most trustworthy hand-hold that never breaks. And God is All-Hearing and All-Knowing." (Qur'an 2:256) "We have shown him the way, he may be thankful or unthankful." (Qur'an 76:3)

"The Truth is from your Lord, so let him who wishes believe and let him who wishes disbelieve." (Qur'an 18:29)

"Indeed there have come to you clear proofs from your Lord: whoever will therefore see, it is for the good of his own soul, and whoever will disbelieve, it shall be against himself." (Qur'an 6:105)

"If you do good, you will do good for your own souls; and if you do evil, it shall be for them." (Qur'an 17:7) 

And if thy Lord had pleased, all those who are in the earth would have believed, all of them. Wilt thou then force men till they are believers? (Qur'an 10:99).

Deuteronomy 13:6-10 "If thy brother, the son of thy mother, or thy son, or thy daughter, or the wife of thy bosom, or thy friend, which is as thine own soul, entice thee secretly, saying, let us go and serve other gods, which thou hast not known, thou, nor thy {fathers;} 7 Namely, of the gods of the people which are round about you, nigh unto thee, or far off from thee, from the one end of the earth even unto the other end of the {earth;} 8 Thou shalt not consent unto him, nor hearken unto {him;} neither shall thine eye pity him, neither shalt thou spare, neither shalt thou conceal him: 9 But thou shalt surely kill him thine hand shall be first upon him to put him to death, and afterwards the hand of all the people. 10 And thou shalt stone him with stones, that he {die;} because he hath sought to thrust thee away from the LORD thy God, which brought thee out of the land of Egypt, from the house of bondage." (KJV)

Deuteronomy 13:6-10 If your very own brother, or your son or daughter, or the wife you love, or your closest friend secretly entices you, saying, "Let us go and worship other gods" (gods that neither you nor your fathers have known, 7 gods of the peoples around you, whether near or far, from one end of the land to the other), 8 do not yield to him or listen to him. Show him no pity. Do not spare him or shield him. 9 You must certainly put him to death. Your hand must be the first in putting him to death, and then the hands of all the people. 10 Stone him to death, because he tried to turn you away from the LORD your God, who brought you out of Egypt, out of the land of slavery. (NIV) Exodus 22:20 "20 'Whoever sacrifices to any god other than the LORD must be destroyed." (NIV)