Berean Standard Bible (BSB)
So when God wanted to make the unchanging nature of His purpose very clear to the heirs of the promise, He guaranteed it with an oath.
World English Bible (WEB)
In this way God, being determined to show more abundantly to the heirs of the promise the immutability of his counsel, interposed with an oath;
Strong's King James
Wherein{G1722}{G3739} God{G2316}, willing{G1014}{(G5740)} more abundantly{G4054} to shew{G1925}{(G5658)} unto the heirs{G2818} of promise{G1860} the immutability{G276} of his{G846} counsel{G1012}, confirmed{G3315}{(G5656)} it by an oath{G3727}:
The F.O.G *
(17) In which, יהוה YAHWEH wants even more to show the heirs of the vow His unshakeable vow, guaranteed by oath!
The F.O.G Message *
Young's Literal Translation
in which God, more abundantly willing to shew to the heirs of the promise the immutability of his counsel, did interpose by an oath,