The Testimony that ‘Muhammad is the Messenger of Allah’ and what it Necessitates To believe that he is a Messenger, and that he is the best, and last of the Messengers; no Messenger will come after him. Allah says: "Muhammad is not the father of any man among you, but he is the Messenger of Allah and the last of the Prophets." (33:40) To believe that he is infallible in the teachings he conveyed from Allah. Allah, the Exalted, says: "Nor does he speak of (his own) desire. It is only an Inspiration that is inspired." (53:3-4) As for the affairs of this world, he was a human, and he would perform ijtihaad in his judgments. The Prophet said: “Indeed I am only a human. It may be that a claimant comes to me with a dispute, and due to one of them being more coercive in speech than the other, I may rule in his favor. Whoever was ruled in his favor while he is wrong, [what he is receiving without right] is only a portion of the Hellfire, so let him take it or leave it.” (Muslim #1713) To believe that he is a Messenger to all creation; to Jinn and men until the Last Hour. Allah says: "And We have not sent you (O Muhammad «peace be upon him») except to all of humanity, as a giver of glad tidings and a warner, but most people know not." (34:28) To obey the Prophet in what he ordered, to believe in everything he said, and to abstain from what he forbade and warned against. Allah says: "And whatsoever the Messenger gives you, take it, and whatsoever he forbids you, abstain (from it)." (59:7) To follow and adhere to the Prophet’s (peace be upon him) Sunnah, without innovating matters in it. Allah, the Exalted, says: "Say (O Muhammad «peace be upon him» to mankind): If you (really) love Allah then follow me, Allah will love you and forgive you of your sins. And Allah is Oft-Forgiving, Most Merciful." (3:31)