Matthew Poole and continuators on Exodus 3:19

19 And I am sure that the King of Egypt will not let you go, no not by a mighty hand .

I know it infallibly before hand.

Though he see and feel the miraculous and dreadful works of a strong, yea almighty hand, yet he will not consent to your going: Which the History makes good. Nor did he let them go till he could hold them no longer, till the fear of his own Life and the clamours of his people forced him to give way to it. And yet, after that he repents of his permission, and laboured to bring them back again. Others but or except by a strong hand, i. e. except by my almighty power he be forced to it. Both Translations come to the same sense.

Marginal references: Or, but by strong hand.