Jonah 1:12

cast me forth into the sea "The question is raised whether Jonah ought of his own accord to have offered himself to death; for his doing so seems to be a sign of despair. He might, indeed, have surrendered himself to their will, but here he, as it were, incites them to the deed. Cast me into the sea, he says, for in no other way will you appease God, than by punishing me. He seems like a man in despair when he thus goes at his own instance to death. But without doubt Jonah recognised that he was divinely summoned to punishment. It is uncertain whether he then conceived a hope of preservation, whether, that is, with a present confidence, he rested on the grace of God; but, however that be, one may gather that he goes forth to death because he perceives and is assuredly persuaded that he is in a manner summoned by the clear voice of God. And so there is no doubt that he patiently undergoes the judgment which the Lord has brought against him." Calvin.