VII. The mariners were hereby more confirmed in their belief that Jonah's God was the only true God (v. 16): Then the men feared the Lord with a great fear, were possessed with a deep veneration for the God of Israel, and came to a resolution that they would worship him only for the future; for there is no other God that can destroy, that can deliver, after this sort. When they saw the power of God in raising and laying the tempest, when they saw his justice upon Jonah his own servant, and when they saw his goodness to them in saving them from the brink of ruin, then they feared the Lord, Jer. v. 22. As an evidence of their fear of him, they offered sacrifice to him when they came ashore again in the land of Israel, and for the present made vows that they would do so, in thankfulness for their deliverance, and to make atonement for their souls. Or, perhaps, they had something yet on board which might be for a sacrifice to God immediately. Or it may be meant of the spiritual sacrifices of prayer and praise, with which God is better pleased than with that of an ox or bullock that has horns and hoofs. See Ps. cvii. 2, &c. We must make vows, not only when we are in the pursuit of mercy, but, which is much more generous, when we have received mercy, as those that are still studying what we shall render.