[30] The historian has recorded for us the names of the two handmaidens, calling them Zilpah and Billah. [7] The name Zilpah, being interpreted, means "a mouth going forth," a symbol of that nature which interprets and speaks. But Billah means "a swallowing," which is the first and most necessary support of all mortal animals. For it is by swallowing that our bodies are established firmly, and the cables of life are attached to this action as to a sure foundation.