Principal English Translation:
a shield with a turquoise mosaic design (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 3 -- The Origin of the Gods, Part IV, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1978), 20.
Attestations from sources in Spanish:
auh Mohquihuix itlahuiz conmaqui quetzalhuexolotl; huitoliuhqui, yxiuhchimal ymac mantiuh = Moquíhuix estaba revestido con una divisa de quetzalhuexólotl; en sus manos llevaba un arco y su escudo de turquesas. (Mexico City, c. 1572)
Ana Rita Valero de García Lascuráin and Rafael Tena, Códice Cozcatzin (México: Instituto Nacional de Antropología e Historia, Benemérita Universidad Autónoma de Puebla, 1994), 103.