R. Johanan sat at the door of the bath-house so that the women should look at his beautiful face and have beautiful children. He was asked if he were not afraid of the Evil Eye. He replied that he was a descendant of the tribe of Joseph, which was not affected by the Evil Eye.
Rabbi Yochanan and the Descendants of Joseph
Gaster, Exempla of the Rabbis No. 222 (1924); Bava Metzia 84a