[Allāh] said, "We will strengthen your arm through your brother and grant you both supremacy so they will not reach you. [It will be] through Our signs; you and those who follow you will be the predominant."
Allah said in response to Moses’s supplication, “O Moses! I shall strengthen you by sending your brother with you as a Messenger and aide to you, and give you the upper hand over your enemy. They shall not be able to harm you with anything you dislike. By our ayaat (signs), you and those believers who follow you, will be victorious over Pharoah and his people.”