So he said, "I will go out and be a lying spirit in the mouth of all his prophets.' And the LORD said, "You shall persuade him and also prevail; go out and do so.'
2 Chronicles 18:21
Surrounding context
18:20 Then a spirit came forward and stood before the LORD, and said, "I will persuade him.' The LORD said to him, "In what way?'
18:21 So he said, "I will go out and be a lying spirit in the mouth of all his prophets.' And the LORD said, "You shall persuade him and also prevail; go out and do so.'
18:22 Therefore look! The LORD has put a lying spirit in the mouth of these prophets of yours, and the LORD has declared disaster against you."