Sforno on Exodus 10:10/ספורנו על שמות י׳:י׳

1כאשר אשלח אתכם ואת טפכם, even less your livestock.

2ראו כי רעה נגד פניכם. I warn you that what you have in mind will boomerang on you and instead of improving your lot will worsen it. Pharaoh used this expression in a sense similar to Esau rejecting his birthright saying הנה אנכי הולך למות, “I am pursuing a path which will lead to my premature death, anyway” (Genesis 25,32). A similar meaning is Solomon saying in Proverbs 5,5 of the immoral woman: רגליה יורדות מות “her feet go down to death.” Our sages in Berachot 28 described the same thought as והם רצים לבאר שחת.