Luke 11:17-19

But He, knowing their thoughts, said to them: “Every kingdom divided against itself is brought to desolation, and a house divided against a house falls. If Satan also is divided against himself, how will his kingdom stand? Because you say I cast out demons by Beelzebub. And if I cast out demons by Beelzebub, by whom do your sons cast them out? Therefore they will be your judges.