King James Bible
And this is the promise that he hath promised us, even eternal life.

New King James Version
And this is the promise that He has promised us—eternal life.

American Standard Version
And this is the promise which he promised us, even the life eternal.

Berean Study Bible
And this is the promise that He Himself made to us: eternal life.

Douay-Rheims Bible
And this is the promise which he hath promised us, life everlasting.

English Revised Version
And this is the promise which he promised us, even the life eternal.

World English Bible
This is the promise which he promised us, the eternal life.

Young's Literal Translation
and this is the promise that He did promise us -- the life the age-during.

1 John 2:25 Additional Translations ...