After all, the children of Israel were not wholly without merits. In a high degree they possessed qualities of extraordinary excellence. There were no incestuous relations among them, they were not evil-tongued, they did not change their names, they clung to the Hebrew language, never giving it up, and great fraternal affection prevailed among them. If one happened to finish the tale of his bricks before his neighbors, he was in the habit of helping the others. Therefore God spake, "They deserve that I should have mercy upon them, for if a man shows mercy unto another, I have mercy upon him."
Four Virtues Israel Kept Even in the Depths of Slavery
Legends of the Jews 4:148