tezcatl machiotl quitlalia.

Headword: 
tezcatl machiotl quitlalia.
Principal English Translation: 

to set a good example for others (see Molina); contains the word for mirror (a metaphor)

Alonso de Molina: 

tezcatl machiotl quitlalia. (pret. tezcatl machiotl oquitlali. vel. oquiteithuiti. / ocotl tlauilli teixpan quiquetza. (pret. ocotl tlauilli teixpan oquiquetz.) dar buen exemplo alos otros.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 112v. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

Another like phrase that Molina provides: ocotl tlahuilli teixpan quiquitza.

themes: 
Metaphors, Proverbs, Riddles