Berean Standard Bible (BSB)
And this is the promise that He Himself made to us: eternal life.
World English Bible (WEB)
This is the promise which he promised us, the eternal life.
Strong's King James
And{G2532} this{G3778} is{G2076}{(G5748)} the promise{G1860} that{G3739} he{G846} hath promised{G1861}{(G5662)} us{G2254}, even eternal{G166} life{G2222}.
The F.O.G *
And this is the promise, which He Himself promised to us: an ageless life (zoe)!
The F.O.G Message *
And this is the vow which He Himself has promised to us: the everlasting life of God!
Young's Literal Translation
and this is the promise that He did promise us—the life the age-during.