Mark 3:24

If a realm is divided against itself, that realm cannot stand:

John 17:21

may they all be one! As thou, Father, art in me and I in thee, so may they be in us ??that the world may believe thou hast sent me.

1 Corinthians 1:10-13

Brothers, for the sake of our Lord Jesus Christ I beg of you all to drop these party-cries. There must be no cliques among you; you must regain your common temper and attitude.

Ephesians 4:3-6

to preserve the unity of the Spirit by binding peace upon yourselves.

Treasury of Scripture Knowledge

Summary

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

Bible References

General references

John 17:21
may they all be one! As thou, Father, art in me and I in thee, so may they be in us ??that the world may believe thou hast sent me.
1 Corinthians 1:10
Brothers, for the sake of our Lord Jesus Christ I beg of you all to drop these party-cries. There must be no cliques among you; you must regain your common temper and attitude.
Ephesians 4:3
to preserve the unity of the Spirit by binding peace upon yourselves.