Then Jonah prayed. These were his feelings when he sank in the waters and while he lay in his mysterious prison; he may have put them into their metrical form after his deliverance. The grammatical arrangement, and especially the language of verse 7, seem to speak of a deliverance already experienced rather than of one expected.
As this "prayer" does not suit an allegory, and as no cue but Jonah could have known its substance, we have here an argument for his authorship. It is rather a thanksgiving than a prayer—like that of Hennas (1 Samuel 2:1).
When he realizes that he was saved from drowning, he uttered his gratitude, and saw that he might hope for further rescue. How he passed the three days we cannot tell; some have thought he was unconscious; but thin is, perhaps, hardly consistent with the notice of his praying, and with the action of his great Antitype, who, during his sojourn in the unseen world, "preached to the spirits in prison" (1 Peter 3:19).
His God. He acknowledges Jehovah as his God. He had proved himself his by inspiration, by chastisement, and now by mercy (Pusey). The following prayer contains ample reminiscences of the Psalms, which would be familiar to a devout Israelite.
Those quoted are mostly what have been considered to belong to David's time. if their date is really ascertained. But it is a matter of controversy, incapable of settlement, whether Jonah or the psalmist is the original.