Exodus 10:21-23

KJV_Strongs(i)
  21 H3068 And the LORD H559 said [H8799]   H4872 unto Moses H5186 , Stretch out [H8798]   H3027 thine hand H8064 toward heaven H2822 , that there may be darkness H776 over the land H4714 of Egypt H2822 , even darkness H4959 which may be felt [H8686]  .
  22 H4872 And Moses H5186 stretched forth [H8799]   H3027 his hand H8064 toward heaven H653 ; and there was a thick H2822 darkness H776 in all the land H4714 of Egypt H7969 three H3117 days:
  23 H7200 They saw [H8804]   H376 not one H251 another H6965 , neither rose [H8804]   H376 any H7969 from his place for three H3117 days H1121 : but all the children H3478 of Israel H216 had light H4186 in their dwellings.