Verses 6-15 provide the full context: the 400 prophets' false consensus, Micaiah's true prophecy, and the king's decision — verse 12 summarizes their false assurance.

Verses 32-36 show Ahab's death in battle, fulfilling Micaiah's true prophecy and directly contradicting the false assurance in verse 12.

In 1 Kings 18:29, the false prophets of Baal also prophesy frantically — a direct parallel to the lying prophets here who promise victory.

Isaiah 44:25 describes God foiling false prophets — exactly what happens here when God sends a lying spirit to deceive them.

Jeremiah 28:11 shows Hananiah falsely prophesying peace — a parallel to the false prophets here promising victory to Ahab.

Proverbs 14:5 contrasts the honest witness with the false witness — the false prophets here are the latter, pouring out lies.