V. 17.— Wherein God, willing more abundantly to shew unto the heirs of promise the immutability of his counsel, confirmed it by an oath. Wherefore God, willing to give the heirs of promise (Romans 4:13-17; Galatians 3:27) the fullest assurance of the unchangeableness of His counsel, confirmed His promise with an oath. Numbers 14:22; chap. 3:17; Isaiah 45:23.