2 Peter 2:3

2:3 And in their greed they will exploit you with deceptive words. Their condemnation pronounced long ago is not sitting idly by; their destruction is not asleep.

Galatians 5:20

5:20 idolatry, sorcery, hostilities, strife, jealousy, outbursts of anger, selfish rivalries, dissensions, factions,

Titus 3:10

3:10 Reject a divisive person after one or two warnings.