Mark 3:24

Even if a kingdom be divided against itself, that kingdom cannot stand:

John 17:21

that all may be one; as thou, Father, in me, and I in thee, that these also may be one in us: that the world may believe that thou hast sent me.

1 Corinthians 1:10-13

Now I conjure you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no schisms among you; but that ye be perfectly united together in the same mind and the same sentiment.

Ephesians 4:3-6

careful to preserve unity of spirit, in the bond of peace.

Treasury of Scripture Knowledge

Summary

And if a kingdom be divided against itself, that kingdom cannot stand.

Bible References

General references

John 17:21
that all may be one; as thou, Father, in me, and I in thee, that these also may be one in us: that the world may believe that thou hast sent me.
1 Corinthians 1:10
Now I conjure you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no schisms among you; but that ye be perfectly united together in the same mind and the same sentiment.
Ephesians 4:3
careful to preserve unity of spirit, in the bond of peace.