2 Chronicles 18:3

And Ahab king of Israel said unto Jehoshaphat king of Judah, Wilt thou go with me to Ramoth-gilead? And he answered him, I am as thou art, and my people as thy people; and we will be with thee in the war.

Jehoshaphat king of Judah pledged to Ahab king of Israel to go with him to Ramoth-gilead, answering that he himself, his people, and his forces would be as Ahab's own in the war. The proposed campaign was against the Syrians, with Ahab seeking to recover Ramoth-gilead, an old city of refuge that he claimed rightfully belonged to Israel. The agreement was rash, promising military support despite reason to doubt the wisdom of the alliance. After the prophet Micaiah warned that the campaign would fail because it was not favored by Heaven, Jehoshaphat was reluctant to withdraw because he had given his word, so both kings went into battle anyway. The pledge drew Jehoshaphat into a disastrous battle in which Ahab was killed, and at sunset the army was ordered to return to their homes, fulfilling the prophet's warning.