When a certain Sadducee saw Rava so engrossed in his studies with his fingers under his feet that Rava ground his fingers so that they bled, the Sadducee exclaimed that Jews were a rash people who in had given precedence to their mouth over their ears, and who persist in their rashness. First, the Sadducee explained, the Israelites should have listened, and then they should have accepted the law only if obeying the commandments was within their powers, but if it was not within their powers, they should not have accepted. Rava replied that the Israelites walked in integrity, for speaks of the Jews when it says, "The integrity of the upright shall guide them." But of others, who walked in perversity, says, "but the perverseness of the treacherous shall destroy them."