Genesis 17:19-21

Brenton(i) 19 And God said to Abraam, Yea, behold, Sarrha thy wife shall bear thee a son, and thou shalt call his name Isaac; and I will establish my covenant with him, for an everlasting covenant, to be a God to him and to his seed after him. 20 And concerning Ismael, behold, I have heard thee, and, behold, I have blessed him, and will increase him and multiply him exceedingly; twelve nations shall he beget, and I will make him a great nation. 21 But I will establish my covenant with Isaac, whom Sarrha shall bear to thee at this time, in the next year.