The crust of the earth as far as the abyss is a thousand ells,
and the abyss under the earth is fifteen thousand. There is an
upper and a lower abyss mentioned in Taanith, fol. 25, col. 2.
Riddia, the angel who has the command of the waters, and resides
between the two abysses, says to the upper, "disperse thy
waters," and to the lower, "let thy waters flow up."
Many may ask after thy peace, but tell thy secret only to one of a
THE TALMUD, _Yevamoth_, fol. 63, col. 2.