for someone not to be good for anything (see Molina, who gives this example in the first person plural, we are not good for anything)
Alonso de Molina:
atle tonecoca. no somos necessarios o prouechosos, para cosa alguna. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 8v. col. 2. Thanks to Joe Campbell for providing the transcription.