See an image that represents xihuitl in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).
yeçe ca quenmanian, onicneltocac in temictli, in xiuhtzintli in peyotl in ololiuhqui? Yhuan in oc cequi tlamantli. = but at times I have believed in dreams, herbs, peyote and ololiuhqui, and other things (central Mexico, 1634)
Bartolomé de Alva, A Guide to Confession Large and Small in the Mexican Language, 1634, eds. Barry D. Sell and John Frederick Schwaller, with Lu Ann Homza (Norman: University of Oklahoma Press, 1999), 9.
yehica ypan ycuiliuhtica yn teotlatolli y nepapan xihuitl yn çacapahtli = because in holy scripture are written the various herbs and "grass medicines" (Central Mexico, 1552)
Fray Alonso de Molina, Nahua Confraternities in Early Colonial Mexico: The 1552 Nahuatl Ordinances of fray Alonso de Molina, OFM, ed. and trans., Barry D. Sell (Berkeley: Academy of American Franciscan History, 2002), 84–85.
ioan quixima, quichiqui in xivitl, in teuxi[vi]tl in incozqui, in incuecueioch in inpipilol = They also shave and scrape turquoise, fine turquoise, to be their necklaces, earrings and pendants. (Tlatelolco, 1540–80)
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 195.