poxacuayhuitl.

auh yn culhuaque yn quinyollotillito ynmomoz mexica cuitlatl poxacuayhuitl yc cenca motlaocoltihque in Mexica = and the Culhuaque provided the Mexica with a heart for their altar. It was of excrement and whippoorwill feathers, wherefore the Mexica were much saddened.
Codex Chimalpahin: Society and Politics in Mexico Tenochtitlan, Tlatelolco, Culhuacan, and Other Nahuatl Altepetl in Central Mexico; The Nahuatl and Spanish Annals and Accounts Collected and Recorded by don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, eds. and transl. Arthur J. O. Anderson and Susan Schroeder (Norman: University of Oklahoma Press, 1997), vol. 2, 30–31.