[Pooya/Ali Commentary 6:115] Tammat - fulfilment or perfection - refers to the following conclusions. 1. Perfection of the religion of Allah after the announcement of the wilayah of Imam Ali at Ghadir Khum - refer to verses 67 and 3 of al Ma-idah . 2. The fulfilment of the promise of sending the comforter, the spirit of truth (the Holy Prophet). Refer to the commentary of al Baqarah : 40. 3. The fulfilment of the promise of help given to the Holy Prophet on several occasions - Badr, Uhad, Khaybar etcetera - when the Holy Prophet and Islam were saved through Imam Ali, the hand of Allah (Yadullah). "There is none who can change His words" is a challenge that the Quran, the revealed word of Allah, will never, like the earlier heavenly scriptures, be tampered with or made to lose its originality and genuineness, as has been explained by Aqa Mahdi Puya in his essay "The originality of the Holy Quran". To save the Quran from tahrif (change), under the command of Allah, the Holy Prophet left the Quran in the safe hands of his Ahl ul Bayt. Refer to hadith al thaqalayn in the introduction under "Essentials: For the readers of the Holy Quran".