New Testament

Matthew 12:22-32

22 Then they brought to him a demon-possessed man who was blind and mute. Jesus healed him so that he could speak and see. 23 All the crowds were amazed and said, “Could this one be the Son of David?” 24 But when the Pharisees heard this they said, “He does not cast out demons except by the power of Beelzebul, the ruler of demons!” 25 Now when Jesus realized what they were thinking, he said to them, “Every kingdom divided against itself is destroyed, and no town or house divided against itself will stand. 26 So if Satan casts out Satan, he is divided against himself. How then will his kingdom stand? 27 And if I cast out demons by Beelzebul, by whom do your sons cast them out? For this reason they will be your judges. 28 But if I cast out demons by the Spirit of God, then the kingdom of God has already overtaken you. 29 How else can someone enter a strong man’s house and steal his property, unless he first ties up the strong man? Then he can thoroughly plunder the house. 30 Whoever is not with me is against me, and whoever does not gather with me scatters. 31 For this reason I tell you, people will be forgiven for every sin and blasphemy, but the blasphemy against the Spirit will not be forgiven. 32 Whoever speaks a word against the Son of Man will be forgiven. But whoever speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come.

Pseudepigrapha

Testament of Solomon 21

And I summoned again to stand before me Beelzeboul, the prince of demons, and I sat him down on a raised seat of honour, and said to him: "Why art thou alone, prince of the demons?" And he said to me: "Because I alone am left of the angels of heaven that came down. For I was first angel in the first heaven, being entitled Beelzeboul. And now I control all those who are bound in Tartarus. But I too have a child, and he haunts the Red Sea. And on any suitable occasion he comes up to me again, being subject to me; and reveals to me what he has done, and I support him.