Exodus 3:19 - Coke's Commentary on the Holy Bible

Will not let you go, no, not by a mighty hand— But by a strong hand. Margin of our Bibles. i.e. But by the exertion of a strong and mighty power, which he will not be able to resist; and which shall subdue that hardness of heart, and backwardness to consent, which he will shew; see Exodus 6:1. Houbigant renders this, ni vis aderit portentorum; unless the force of miracles be exerted; which is rather a paraphrase than a translation: unless with a strong hand, seems the true interpretation.