The player is loading ...

God causes three days of complete darkness.
Resources used:
Carl Friedrich Keil and Franz Delitzsch, Commentary on the Old Testament, vol. 1 (Peabody, MA: Hendrickson, 1996), 323.
Douglas K. Stuart, Exodus, vol. 2, The New American Commentary (Nashville: Broadman & Holman Publishers, 2006), 255–261.