Mahabharata 14.18.16

मातापित्रोश्च शुश्रूषा देवतातिथिपूजनम्गुरुपूजा घृणा शौचं नित्यमिन्द्रियसंयमः

mātāpitrośca śuśrūṣā devatātithipūjanamgurupūjā ghṛṇā śaucaṃ nityamindriyasaṃyamaḥ

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