Amram's sagacity kept pace with his piety and his learning. The Egyptians succeeded in enslaving the Hebrews by seductive promises. At first they gave them a shekel for every brick they made, tempting them to superhuman efforts by the prospect of earning much money. Later, when the Egyptians forced them to work without wages, they insisted upon having as many bricks as the Hebrews had made when their labor was paid for, but they could demand only a single brick daily from Amram, for he had been the only one whom they had not led astray by their artifice. He had been satisfied with a single shekel daily, and had therefore made only a single brick daily, which they had to accept afterward as the measure of his day's work.
Wisdom of Amram
Legends of the Jews 4:39