Mahabharata 12.109.3

भीष्म उवाच · bhīṣma uvāca

मातापित्रोर्गुरूणां च पूजा बहुमता ममअत्र युक्तो नरो लोकान्यशश्च महदश्नुते

mātāpitrorgurūṇāṃ ca pūjā bahumatā mamaatra yukto naro lokānyaśaśca mahadaśnute

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