Brewer's: Milk and Honey
A land of milk and honey. That is, abounding in all good things, or of extraordinary fertility. Joel iii. 18 speaks of “the mountains flowing with milk and honey.” Figuratively used to denote all the blessings of heaven.
Jerusalem the golden, With milk and honey blest.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894