याज्ञवल्क्येति होवाच कत्ययमद्योद्गातास्मिन् यज्ञे स्तोत्रियाः स्तोष्यतीति ।तिस्र इति ।कतमास्तास्तिस्र इति ।पुरोनुवाक्या च याज्या च शस्यैव तृतीया ।कतमास्ताः ।या अध्यात्ममिति ।प्राण एव पुरोनुवाक्यापानो याज्या व्यानः शस्या ।किं ताभिर्जयतीति ।पृथिवीलोकमेव पुरोनुवाक्यया जयत्यन्तरिक्षलोकं याज्यया द्युलोकं शस्यया ।ततो ह होताश्वल उपरराम ॥३,१.१० ॥
In plain words
"Yājñavalkya," he said, "how many chants will the Udgātṛ sing today at this sacrifice?" "Three." "Which are those three?" "The verse said before, the offering verse, and the recited verse as the third." "Which are they with respect to the self?" "The out-breath is the verse said before, the down-breath the offering verse, and the diffused breath the recited verse." "What does one win by them?" "By the verse said before one wins the world of the earth, by the offering verse the world of the middle region, and by the recited verse the world of heaven." Thereupon the Hotṛ Aśvala fell silent.