John 17:23 in the King James Version
I in them, and thou in me, that they may be made perfect in one; and that the world may know that thou hast sent me, and hast loved them, as thou hast loved me.
Context
22 The glory which you have given me, I have given to them, that they may be one, even as we are one,
23 I in them, and you in me, that they may be perfected into one, that the world may know that you sent me and loved them, even as you loved me.
24 Father, I desire that they also whom you have given me be with me where I am, that they may see my glory which you have given me, for you loved me before the foundation of the world.