Ibn Ezra, on Gen 49:25

“The God of thy father shall be thy helper, and the Almighty shall bless thee with the blessings of heaven above, with the blessings of the deep that lieth beneath, with the blessings of the breasts and of the womb.”

“Blessings of breasts and womb. The breasts are similar to the heavens, and the womb to the deep, and the sense [of the blessing] is that they [should] increase their children. And the opposite of this is "a womb that miscarries and shrivelled breasts" (Hosea 9:14).”

Imported from an open dataset — not yet checked against the printed edition.