John Trapp on Jonah 1:16

Ver. 16. Then the men feared the Lord exceedingly] Heb: with a great feare, They feared before. ver. 10. with a naturall feare: but now they feared Jehovah, they began to beare an awfull reſpect to the divine Majeſty, of whoſe power and goodneſſe they were by this miracle clearely convinced, and as it may ſeem, to the true faith effectually converted.

For They offered a ſacrifice to the Lord] They ſacrificed ſpirituall ſacrifices preſently, (that holocauſt of themſelves Rom. 12.1. that broken heart that lieth low and heareth all that God ſaith, giving thanks to his name Heb. 13.15.) and reſolved to cover Gods altar at Jeruſalem upon their ſafe arrivall, as the Chaldee here paraphraſeth.

and made vows] That the true God ſhould be their God (as Iacob the father of vows promiſed Gen. 28.21.) and that they would beſtow coſt on the Temple, on the poor Saints, to feed and cloath them, as Iſa. 23.18. &c.