Sforno on Exodus 3:20/ספורנו על שמות ג׳:כ׳

1והכיתי את מצרים בכל נפלאותי, in a manner which will make everyone who hears about these plagues sit up and take notice. Many of those who will hear about this will perhaps repent and abandon idolatry. [the author does not view the plagues as a punishment but as G’d’s educational tool. Ed.]