*3:18 The proclamation of faith (Shahaadah) that is decreed by God is: "There is no god except God," in Arabic "La Elaaha Ella Allah" (see also 37:35, 47:19). The corrupted Muslims insist upon adding a second "Shahaadah" proclaiming that Muhammad is God's messenger. This is by definition "Shirk" (idolatry) and a flagrant defiance of God and His messenger. Additionally, it violates the major commandments in 2:136, 2:285, 3:84, & 4:150-152 prohibiting any distinction among God's messengers. By proclaiming that "Muhammad is a messenger of God," and failing to make the same proclamation for other messengers such as Abraham, Moses, Jesus, Saleh, and Jonah, a distinction is committed and a major commandment is violated.
*3:86 Verses 3:82-90 inform us that those who reject God's Messenger of the Covenant are no longer submitters (Muslims), since they no longer believe the Quran. The proofs mentioned in 3:86 refer to the Quran's mathematical code, which was revealed through God's Messenger of the Covenant. Both 3:86 and 3:90 talk about "disbelieving after believing."