 Similarly, in the Jerusalem Talmud, Rabbi Simeon ben Lakish (Resh Lakish) taught that when the Israelites were crossing the Jordan River, they took upon themselves responsibility for each other's hidden sins as well as revealed sins.Joshua told them that if they did not accept responsibility for hidden things, the waters of the Jordan would descend and drown them.Rabbi Simon bar Zabeda agreed, saying that we know that this is true, because Achan sinned in secret after the Israelites crossed the Jordan, and the majority of the Sanhedrin fell at the battle of Ai on account of Achan's sin.