In this way, the sons of God are made manifest, and also the sons of the devil. Everyone who is not just, is not of God, as also anyone who does not love his brother
Other versions
King James Version
In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.English Standard Version
By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother.New International Version
This is how we know who the children of God are and who the children of the devil are: Anyone who does not do what is right is not a child of God; nor is anyone who does not love his brother.