NET
21 He replied, ‘I will go out and be a lying spirit in the mouths of all his prophets.’ The Lord said, ‘Deceive and overpower him. Go out and do as you have proposed.’
Darby
21 And he said, I will go forth, and will be a lying spirit in the mouth of all his prophets. And he said, Thou shalt entice [him], and also succeed: go forth, and do so.
KJV
21 And he said, I will go out, and be a lying spirit in the mouth of all his prophets. And [the LORD] said, Thou shalt entice [him], and thou shalt also prevail: go out, and do [even] so.