וְהָיָ֣ה לְאָבָ֔ק עַ֖ל כָּל־אֶ֣רֶץ מִצְרָ֑יִם וְהָיָ֨ה עַל־הָאָדָ֜ם וְעַל־הַבְּהֵמָ֗ה לִשְׁחִ֥ין פֹּרֵ֛חַ אֲבַעְבֻּעֹ֖ת בְּכָל־אֶ֥רֶץ מִצְרָֽיִם׃
And it shall become small dust over all the land of Egypt, and shall be a boil breaking forth with blains upon man and upon beast, throughout all the land of Egypt.’
Read halakhic rulings (Jewish law) on Exodus 9:9: and classical halakhic sources.