We call it lamb's-quarter, for the lamb doth eat it by choice.    From Wordnik.com.  [Woodland Tales] Reference

Luxuriant beds of the green stuff known in the United States as lamb's-quarter, abound, and I put one of the sowars to gathering some with the idea of cooking it for supper.    From Wordnik.com.  [Around the World on a Bicycle - Volume II From Teheran To Yokohama] Reference

The lamb's-quarter, wild cucumber, sand-rush, and narrow dock, are also common. ".    From Wordnik.com.  [First Across the Continent; The Story of The Exploring Expedition of Lewis and Clark in 1804-5-6] Reference