If you do not help him [the Prophet]; God [will, as He] supported him at the time when the unbelievers drove him away. He was only one of two. When these two were alone in the cave, he said to his companion: ‘Do not grieve, for God is with us’. Thereupon God bestowed on Him the gift of inner peace, and sent to his aid forces which you did not see. He brought the word of the unbelievers utterly low, while the word of God remained supreme. God is mighty, wise.