Sforno on Exodus 9:29/ספורנו על שמות ט׳:כ״ט

1כצאתי את העיר, even though you have said to me that you have endured already enough of this the plague will not cease until I have left the boundaries of the capital and only then הקולות יחדלון והברד לא יהיה עוד למען תדע כי לה' הארץ, all of these phenomena will occur simultaneously, in contrast to the natural order of things. This will not happen as a result of My thinking that you have already become a penitent, regretting his sins; on the contrary your education has not yet been completed, ידעתי כי טרם תיראון, I am fully aware that you still do not relate to the Creator with reverence and awe.