Mark 3:21-22, 30

When His own family heard this they went to take custody of Him; for they were saying, “He is out of His mind.” The scribes who came down from Jerusalem were saying, “He is possessed by Beelzebul (Satan),” and “He is driving out the demons by the [power of the] ruler of the demons.” [Matt 12:22-37; Luke 11:14-28]

[Jesus said this] because the scribes and Pharisees were [attributing His miracles to Satan by] saying, “He has an unclean spirit.”