Moses sent his father-in-law Jethro back to his home, shortly before the revelation on Mount Sinai. He thought: "When God gave us a single commandment of the Torah in Egypt, the Passover, He said, 'There shall no stranger eat thereof.' Surely Jethro may not look on when God bestows on us the whole Torah." Moses was right: God did not want Jethro to be present at the revelation. He said: "Israel was in Egypt, bound to work with clay and bricks, at the same time as Jethro was sitting at home in peace and quiet. He who suffers with the community shall share their future joys, but he who does not share the sufferings of the community shall not take part in their rejoicing."