17In the same way God, desiring even more to demonstrate to the heirs of the promise the fact that His purpose is unchangeable, confirmed it with an oath,
17In the same way God, in His desire to show to the heirs of the promise the unchangeable nature of His purpose, intervened and guaranteed it with an oath,
17So God gave his word when he made his promise. He wanted to make it very clear that his purpose does not change. He wanted those who would receive what was promised to know this.
17God wanted to show very clearly that he would never change his purpose. He wanted his people to know that he would certainly bless them. So when he made this promise, he also used his own name to make it strong.