Mahabharata 13.93.3

युधिष्ठिर उवाच · yudhiṣṭhira uvāca

यदिदं तप इत्याहुरुपवासं पृथग्जनाःतपः स्यादेतदिह वै तपोऽन्यद्वापि किं भवेत्

yadidaṃ tapa ityāhurupavāsaṃ pṛthagjanāḥtapaḥ syādetadiha vai tapo'nyadvāpi kiṃ bhavet

Our plain-language meaning of this verse is waiting for scholar review.