וַיֹּ֤אמֶר יְהוָה֙ אֶל־מֹשֶׁ֔ה עַתָּ֣ה תִרְאֶ֔ה אֲשֶׁ֥ר אֶֽעֱשֶׂ֖ה לְפַרְעֹ֑ה כִּ֣י בְיָ֤ד חֲזָקָה֙ יְשַׁלְּחֵ֔ם וּבְיָ֣ד חֲזָקָ֔ה יְגָרְשֵׁ֖ם מֵאַרְצֽוֹ׃ (ס)
Da sprach der Herr zu Mose: Nun sollst du sehen, was ich tun will an Pharao; denn durch starke Hand soll er sie entlassen und durch starke Hand soll er sie gar treiben aus seinem Lande.
Rashi on Exodus
עתה תראה וגו׳ NOW THOU SHALT SEE etc. — You have criticised My methods of guiding the world. You are not like Abraham to whom I said. (Genesis 21:12) “for through Isaac shall seed be raised unto thee” and to whom I afterwards said, (Gen 22:2) “bring him up as a burnt offering”, and yet he did not criticise My ways, therefore, עתה תראה NOW THOU SHALT SEE — what will now be done to Pharaoh thou shalt see, but thou shalt not see what will be done to the kings of the seven nations of Canaan when I shall bring them (the Israelites) into the Holy Land (cf. Sanhedrin 111a).
Rashbam on Exodus
כי ביד חזקה ישלחם, He will send them off in spite of the Israelites. The reference is to the fact that the Israelites will be expelled by him, not released, as the Torah reports in Exodus 12,33.
Sforno on Exodus
. עתה תראה, now that you have seen yourself the sin of Pharaoh who has the nerve to hold on to the Israelites with the authority of his office, you will see that he will not only release them voluntarily, but ביד חזקה ישלחם, not only will he release them, but he will be forced to get rid of them post haste due to the problems he will have while they are still in his country.