When men began to increase on earth and daughters were born to them, the divine beings saw how beautiful the daughters of men were and they took wives from among those that pleased them. ... It was then, and later too, that the Nephilim appeared on earth—when the divine beings cohabited with the daughters of men, who bore them offspring. ...
Genesis 6:1-4 (Torah)
Then God sent a spirit of discord between Abimelech and the citizens of Shechem, and the citizens of Shechem broke faith with Abimelech—
Judges 9:23 (Tanakh)
But [Micaiah] said, “I call upon you to hear the word of the LORD! I saw the LORD seated upon His throne, with all the host of heaven standing in attendance to the right and to the left of Him. The LORD asked, ‘Who will entice Ahab so that he will march and fall at Ramoth-gilead?’ Then one said thus and another said thus, until a certain spirit came forward and stood before the LORD and said, ‘I will entice him.’ ‘How?’ the LORD asked him. And he replied, ‘I will go out and be a lying spirit in the mouth of all his prophets,’ Then He said, ‘You will entice and you will prevail. Go out and do it.’ So the LORD has put a lying spirit in the mouth of all these prophets of yours; for the LORD has decreed disaster upon you.”
1 Kings 22:19-23 (Tanakh)
However, the prince of the Persian kingdom opposed me for twenty-one days; now Michael, a prince of the first rank, has come to my aid, after I was detained there with the kings of Persia. … Then one who looked like a man touched my lips, and I opened my mouth and spoke, ... Now I must go back to fight the prince of Persia. When I go off, the prince of Greece will come in. No one is helping me against them except your prince, Michael. ...
Daniel 10:13-21 (Tanakh)
“When an evil spirit comes out of a man, it goes through arid places seeking rest and does not find it. Then it says, ‘I will return to the house I left.’ When it arrives, it finds the house unoccupied, swept clean and put in order. Then it goes and takes with it seven other spirits more wicked than itself, and they go in and live there. And the final condition of that man is worse than the first. That is how it will be with this wicked generation.”
Matthew 12:43-45 (NIV)
Jesus was driving out a demon that was mute. When the demon left, the man who had been mute spoke, and the crowd was amazed.
Luke 11:14 (NIV)
On a Sabbath Jesus was teaching in one of the synagogues, and a woman was there who had been crippled by a spirit for eighteen years. She was bent over and could not straighten up at all. ... Then should not this woman, a daughter of Abraham, whom Satan has kept bound for eighteen long years, be set free on the Sabbath day from what bound her?”
Luke 13:10-16 (NIV)
Once when we were going to the place of prayer, we were met by a slave girl who had a spirit by which she predicted the future. ...
Acts 16:16 (NIV)
Now to each one the manifestation of the Spirit is given for the common good. ... to another distinguishing between spirits,...
1 Corinthians 12:7-10 (NIV)
Finally, be strong in the Lord and in his mighty power. Put on the full armor of God so that you can take your stand against the devil’s schemes. For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms.
Ephesians 6:10-12 (NIV)
Are not all angels ministering spirits sent to serve those who will inherit salvation? We must pay more careful attention, therefore, to what we have heard, so that we do not drift away.
Hebrews 1:14-2:1 (NIV)
Do not forget to entertain strangers, for by so doing some people have entertained angels without knowing it.
Hebrews 13:2 (NIV)
And there was war in heaven, Michael and his angels fought against the dragon, and the dragon and his angels fought back. But he was not strong enough, and they lost their place in heaven. The great dragon was hurled down—that ancient serpent called the devil, or Satan, who leads the whole world astray. He was hurled to the earth, and his angels with him.
Revelation 12:7-9 (NIV)