Here are 7 Bible verses about unity among believers from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
1 Peter 3:8 KJV
Finally, be ye all of one mind, having compassion one of another, love as brethren, be pitiful, be courteous:
Philippians 1:27 KJV
Only let your conversation be as it becometh the gospel of Christ: that whether I come and see you, or else be absent, I may hear of your affairs, that ye stand fast in one spirit, with one mind striving together for the faith of the gospel;
Romans 12:16 KJV
Be of the same mind one toward another. Mind not high things, but condescend to men of low estate. Be not wise in your own conceits.
Acts 4:32 KJV
And the multitude of them that believed were of one heart and of one soul: neither said any of them that ought of the things which he possessed was his own; but they had all things common.
Philippians 2:2 KJV
Fulfil ye my joy, that ye be likeminded, having the same love, being of one accord, of one mind.
Romans 14:19 KJV
Let us therefore follow after the things which make for peace, and things wherewith one may edify another.
Ephesians 4:3 KJV
Endeavouring to keep the unity of the Spirit in the bond of peace.