13Pharaoh, however, hardened his heart and would not listen to them, just as the LORD had foretold.First Plague: Water Turned into Blood. [A][7:14–12:30] After a brief preface (vv. 8–13) drawn from the Priestly source, a narrative depicting the series of ten disasters that God brings upon Pharaoh because of his stubbornness ensues. Although most of these disasters, known traditionally as the “ten plagues of Egypt,” could be interpreted as naturally occurring phenomena, they are clearly represented by the biblical authors as extraordinary events indicative of God’s intervention on behalf of Israel and as occurring exactly according to Moses’ commands. See Ps 78:43–51 and 105:27–36 for poetic versions of these plagues, which also differ significantly from the account here.