וַיֹּ֨אמֶר יְהוָ֜ה אֶל־מֹשֶׁ֗ה נְטֵ֤ה יָֽדְךָ֙ עַל־הַשָּׁמַ֔יִם וִ֥יהִי חֹ֖שֶׁךְ עַל־אֶ֣רֶץ מִצְרָ֑יִם וְיָמֵ֖שׁ חֹֽשֶׁךְ׃
The Five Books of Moses, by Everett Fox
Little is new here; darkness foreshadows the final plague, death. Yet at the end of the brief episode, as well as in 11:8, we are given a glimpse into the human element, as Moshe and Pharaoh rage in anger against each other.