Ezekiel depicts the destruction of Jerusalem as a purificatory sacrifice upon the altar, made necessary by the "abominations" in the Temple (the presence of idols and the worship of the god Tammuz) described in chapter 8. The process of purification begins, God prepares to leave, and a priest lights the sacrificial fire to the city. Nevertheless, the prophet announces that a small remnant will remain true to Yahweh in exile, and will return to the purified city. The image of the valley of dry bones returning to life in chapter 37 signifies the restoration of the purified Israel.