From Aesop's Fables:
A lioness and a vixen were talking together about their young, as mothers will, and saying how healthy and well grown they were, and what beautiful coats they had, and how they were the image of their parents. "My litter of cubs is a joy to see," said the fox; and then she added, rather maliciously, "But I notice you never have more than one." "No," said the lioness grimly, "but that one's a lion."
Quality, not quantity.