Then three years passed without war between Aram and Israel.
Though Ahab continued under guilt and wrath, and the dominion of the lusts to which he had sold himself, yet, as a reward for his professions of repentance and humiliation, though the time drew near when he should descend into battle and perish, yet we have him blessed with a three years' peace (Kg1 22:1) and an honourable visit made him by Jehoshaphat king of Judah, Kg1 22:2.
Commenting on 1 Kings 22:1-14
And they continued three years without war between Syria and Israel. From the time that Benhadad made a covenant with Ahab; not three full years, but part of them: it was threatened by Elijah from the Lord, that Ahab's life should go for Benhadad's, because he had let him, go, Kg1 22:42, but because of his humiliation, as is thought by Ben Gersom and others...
And they continued three years without war between Syria and Israel. (a) Ben-hadad the king of Syria, and Ahab made a peace which endured three years.