Rabbi Yosei HaGelili said: Come and see how severe is the power of transgression, as until they transgressed, there were no zavim and lepers in their midst. Once they transgressed, there were zavim and lepers in their midst. According to our approach, we learned that these three matters22The presence of zavim, the presence of lepers, and death. The verse also mentions people who are impure because they came in contact with somebody who died. From the giving of the Torah until the sin of the Golden Calf, the angel of death was suspended and did not take any lives. occurred on that very day.23Sifrei, Naso 1.