Paumacariya 2.86

2.86

ghēttūṇa samaṇadhammaṁ, ghōraparīsahaparāiyā annē
bhajanti saṁjamāō, sēvanti aṇuvayāṇi puṇō

Others, having undertaken the duty of a mendicant, overcome by dreadful hardships, / fall from self-restraint, but still observe the minor vows (aṇuvratas).