Isaiah Tishby

They went to Rabbi Simeon and found him studying Torah. Rabbi Simeon raised his eyes and saw Rabbi Isaac, and he saw the angel of death running and dancing in front of him. Rabbi Simeon arose, and took Rabbi Isaac by the hand, and said : I command that whoever is accustomed to enter should enter, and whoever is not accustomed to enter should not enter.

Rabbi Isaac and Rabbi Judah entered. The angel of death was bound outside.

Tome I, p. 135, Zohar I, 217b