Luke 11:17-26 NASBS
[17] But He knew their thoughts and said to them, "Any kingdom divided against itself is laid waste; and a house divided against itself falls. [18] If Satan also is divided against himself, how will his kingdom stand? For you say that I cast out demons by Beelzebul. [19] And if I by Beelzebul cast out demons, by whom do your sons cast them out? So they will be your judges. [20] But if I cast out demons by the finger of God, then the kingdom of God has come upon you. [21] When a strong man, fully armed, guards his own house, his possessions are undisturbed. [22] But when someone stronger than he attacks him and overpowers him, he takes away from him all his armor on which he had relied and distributes his plunder. [23] He who is not with Me is against Me; and he who does not gather with Me, scatters. [24] "When the unclean spirit goes out of a man, it passes through waterless places seeking rest, and not finding any, it says, 'I will return to my house from which I came.' [25] And when it comes, it finds it swept and put in order. [26] Then it goes and takes along seven other spirits more evil than itself, and they go in and live there; and the last state of that man becomes worse than the first."
This appears to be a warning to the Jewish leaders and what will happen to the Jewish nation when rejecting their Messiah (as happened in 70AD).