Al-'Imran (The Family of Imran)
Surah 3 · Verse 81
And when Allah took a pledge from the prophets, “Behold! that which I give you of the book and wisdom, then (when) there comes to you a messenger confirming that which is with you, you must definitely believe in him and you must definitely help him (probably by propagating the news of the coming of Prophet Muhammed, among their respective followers).” He asked, “Do you agree and do you accept My burden (responsibility) concerning this (matter)?” They replied, “We agree.” He said, “Then bear witness and I am (also) with you from among those who bear witness.”
“Allah (SWT) appears to have taken a pledge from all the prophets (PBT) that they should inform their respective followers that His last Messenger will be Mohammed (PBH), which they fulfilled. Therefore if anyone turns away from the Quran revealed to prophet Mohammed (PBH) then he is a transgressor.”



