Rashi on Exodus 10:11/רש"י על שמות י׳:י״א

1לא כן NOT SO as you have said, to take the children with you, but 'לכו נא הגברים ועבדו את ה GO YE WHO ARE ADULT MEN AND SERVE THE LORD.

2כי אתה אתם מבקשים means FOR THAT IS WHAT YE DID SEEK till now: let us sacrifice to our God — and it is not the custom for little children to offer sacrifice.

3ויגרש אותם AND HE DROVE THEM OUT — This is an elliptical phrase and it does not expressly state who drove them out (i. e. the subject of the verb is omitted).