Infighting
If two groups of believers fight, make peace between them. But if one of them transgresses against the other, then fight the aggressor until they return to God’s command. If they return, reconcile between them with justice and fairness, surely God loves those who act justly.
49:9And if two parties of believers fall to fighting, then make peace between them. And if one party of them doeth wrong to the other, fight ye that which doeth wrong till it return unto the ordinance of Allah; then, if it return, make peace between them justly, and act equitably. Lo! Allah loveth the equitable.