Peah, chap. 8, mish. 9.
Fifty measures of understanding were created in the world, and all except one were given to Moses; as it is said (Ps. viii. 5), "Thou hast made him a little lower than the angels."
Rosh Hashanah, fol. 21, col, 2.
Poverty in a house is harder to bear than fifty plagues.
Bava Bathra, fol 116, col. 1.
The above saying is based on Job xix. 21, compared with Exod. viii. 19.
For fifty-two years no man traveled through the land of Judea.
Yoma. fol. 54, col. 1.
Black cummin is one of the sixty deadly drugs.