Wisdom 11:5

Verse 5. By what things, and so forth The meaning is, that God, who wrought a miracle to punish the Egyptians by thirst, when he turned all their waters into blood, (at which time the Israelites, who were exempt from those plagues, had plenty of water) wrought another miracle in favour of his own people in their thirst, by giving them water out of the rock. Challoner.—The Egyptians were thus tormented by thirst, though so near the Nile; and the Hebrews were refreshed in a barren desert. Exodus 7:20.