So Moses lifted up his hand towards the sky and it became completely dark. It was dark through the whole country of Egypt for three days. People could not see each other. Nobody could move anywhere for three days. But the Israelites had light in the places where they lived. Exodus 10:22-23
摩西向天伸杖， 埃及遍地就烏黑了三天。 三天之久，人不能相見，誰也不敢起來離開本處；惟有以色列人家中都有亮光。 出埃及記 10:22-23