Ambrose of Milan, on Exod 17:12

“And Moses’ hands were heavy: so they took a stone, and put under him, and he sat on it: and Aaron and Hur stayed up his hands on both sides. And it came to pass that his hands were not weary until sunset.”

“Moses showed this when his hands became so heavy that Joshua the son of Nun could hardly hold them up. For that reason the people conquered when they performed works not carelessly but with full consideration and virtue—not with faltering souls nor with a wavering disposition but with the stability of a firm mind.”

Imported from an open dataset — not yet checked against the printed edition.