Then believed they his words,.... And not till then; for this is observed, not to their commendation, but to show the slowness of their hearts to believe; they believed on sight, but not before, as Thomas did; whereas, "blessed are they that have not seen, and yet have believed", Joh 20:29. When they saw the Egyptians dead on the sea shore, then they believed the Lord, and his servant Moses; what he said by his servant Moses, that he would save them from the Egyptians, whom they should see no more, that is, alive, Exo 14:13. The Targum is, "and they believed in the name of his Word.'' They sang his praise; Moses with the men, and Miriam with the women; the song is recorded Exo 15:1 and thus when the people of God have got the victory over the antichristian beast, they will stand on a sea of glass and sing the song of Moses and of the Lamb, Rev 15:2.