Exodus 2:23

[ויהי בימים הרבים ההם AND IT CAME TO PASS DURING THOSE MANY DAYS during which Moses was sojourning in Midian, וימת מלך מצרים THAT THE KING OF EGYPT DIED, and the Israelites felt the need of help; and therefore ומשה היה רעה “And Moses fed the flock” and help came through him. For this reason these chapters are placed in juxtaposition]. וימת מלך מצרים THE KING OF EGYPT DIED — he became stricken with leprosy (and therefore may be spoken of as dead; cf. Numbers 12:12), and he used to slaughter Israelitish children and bathe in their blood as a cure for his disease (cf. Targum Jonathan and Exodus Rabbah 1:34).

וַיְהִי֩ בַיָּמִ֨ים הָֽרַבִּ֜ים הָהֵ֗ם וַיָּ֙מׇת֙ מֶ֣לֶךְ מִצְרַ֔יִם וַיֵּאָנְח֧וּ בְנֵֽי־יִשְׂרָאֵ֛ל מִן־הָעֲבֹדָ֖ה וַיִּזְעָ֑קוּ וַתַּ֧עַל שַׁוְעָתָ֛ם אֶל־הָאֱלֹהִ֖ים מִן־הָעֲבֹדָֽה׃

And it came to pass in the course of those many days, that the king of Miżrayim died: and the children of Yisra᾽el sighed by reason of the bondage, and they cried, and their cry rose up to God by reason of the bondage.