Talmud zu Mischlej 5:16

Rabban Yohanan Ben Zakkai had five students, and he had a name for each of them. He called Eliezer ben Hyrcanus “the Plastered Pit,” because it never loses a drop, and “the Sealed Bottle,” because it keeps all of its wine. He called Yehoshua ben Hananya “the Triple Knot,” because it does not get severed easily. He called Yosei HaKohen “the Saint of the Generation.” He called Yishmael ben Hananya “the Oasis in the Desert,” which holds on to its water. (Happy is the student whose teacher praises him and speaks of his virtues!) He called Elazar ben Arach “the Flowing Stream” and “the Bubbling Brook,” for its waters overflow and go out into the world, as it says (Proverbs 5:16), “Your wellsprings will burst forth, and the streams will spill out onto the streets.”