युगप्रजालक्षणम् ऋषिप्रवरवर्णनं च
Yuga–Prajā-Lakṣaṇa and the Enumeration of Eminent Ṛṣis
इदं त्विदमिदं नैदमित्यनिश्चित्य संशयम् / इदमेवं विधातव्यमित्ययं विधिरुच्यते
idaṃ tvidamidaṃ naidamityaniścitya saṃśayam / idamevaṃ vidhātavyamityayaṃ vidhirucyate
When one cannot decide, “this is it” or “this is not it,” doubt arises. And the injunction that says, “this is to be done thus,” is called vidhi, the rule.