LXX2012(i)
19 And God said to Abraam, Yes, behold, Sarrha your wife shall bear you a son, and you shall 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 you, 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 you at this time, in the next year.