ipan ninemi in qualli (pret. ipan oninen in qualli.) perseuerar enel bien. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 41v. col. 2. Thanks to Joe Campbell for providing the transcription.
Attestations from sources in English:
The example is given in the first person singular.