John 10:30 I and the Father are one.
John 17:21 That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.
“That they may be one” as we are one
Psalms 133:1 A Song of degrees of David. Behold, how good and how pleasant it is for brethren to dwell together in unity!