Genesis 17:1

Ninety years old and nine] Ishmael was now thirteen years old, and Abraham probably expected no other heir. But his faith was to be put to a further test. The Almighty God] Heb. el Shaddai: the name of power shows the ability to perform what was promised. Walk before me, and be thou perfeet] i.e. always conscious of My presence, and living a pious, whole-hearted, upright life. These are the conditions required by God in connexion with the covenant about to be made.