American Standard Version
Hereby we know that we love the children of God, when we love God and do his commandments.

Berean Study Bible
By this we know that we love the children of God: when we love God and keep His commandments.

Douay-Rheims Bible
In this we know that we love the children of God: when we love God, and keep his commandments.

English Revised Version
Hereby we know that we love the children of God, when we love God, and do his commandments.

King James Bible
By this we know that we love the children of God, when we love God, and keep his commandments.

World English Bible
By this we know that we love the children of God, when we love God and keep his commandments.

Young's Literal Translation
in this we know that we love the children of God, when we may love God, and His commands may keep;

1 John 5:2 Additional Translations ...