Mankind was on one religion ; so Allah sent Prophets giving glad tidings and warnings – and with them sent down the true Book to judge between mankind on their differences ; and only those to whom it was given created disputes regarding the Book , after clear commands had come to them , due to hostility of one another ; so Allah , by His command , made the truth clear to the believers , concerning their disputes ; and Allah may guide whomever He wills to the Straight Path .