Rabbi Joḥanan said that he would sit at the gate of the bathhouse ("mikvah"), and when Jewish women came out, they would look at him and have children as handsome as he was. The Rabbis asked him whether he was not afraid of the evil eye for being so boastful. He replied that the evil eye has no power over the descendants of Joseph, citing the words of , "Joseph is a fruitful vine, a fruitful vine above the eye ("alei ayin")." Rabbi Abbahu taught that one should not read "alei ayin" ("by a fountain"), but "olei ayin" ("rising over the eye"). Rabbi Judah (or some say Rabbi Jose) son of Rabbi Ḥanina deduced from the words "And let them (the descendants of Joseph) multiply like fishes ("ve-yidgu") in the midst of the earth" in that just as fish ("dagim") in the sea are covered by water and thus the evil eye has no power over them, so the evil eye has no power over the descendants of Joseph. Alternatively, the evil eye has no power over the descendants of Joseph because the evil eye has no power over the eye that refused to enjoy what did not belong to it — Potiphar's wife — as reported in .