 Rabbi Hiyya bar Abba once found Rabbi Joshua ben Levi, who had hurriedly thrown a cloth upon his head, taking his child (or some say grandchild) to the synagogue to study.When Rabbi Hiyya asked Rabbi Joshua what was going on, Rabbi Joshua replied that it was no small thing that the words "you shall make them known to your children and your children's children" are immediately followed by the words "The day that you stood before the Lord your God in Horeb.