John 13:35 in the King James Version
By this shall all men know that ye are my disciples, if ye have love one to another.
Context
34 A new commandment I give to you, that you love one another. Just as I have loved you, you also love one another.
35 By this everyone will know that you are my disciples, if you have love for one another.”
36 Simon Peter said to him, “Lord, where are you going?” Jesus answered, “Where I am going, you can’t follow now, but you will follow afterwards.”