तं हैतमतिधन्वा शौनक उदरशाण्डिल्यायोक्त्वोवाच यावत्त एनं प्रजायामुद्गीथं वेदिष्यन्ते परोवरीयो हैभ्यस्तावदस्मिँल्लोके जीवनं भविष्यति ॥ १.९.३ ॥
In plain words
Atidhanvan Śaunaka taught this to Udaraśāṇḍilya and said: "So long as thy descendants shall know this Udgītha, so long shall their life in this world be higher than the high,
The commentators
Chāndogyopaniṣadbhāṣyam· bhāṣya
स्यापत्य शौनक, उदरशाण्डिल्याय शिष्याय एतम उद्गीथ दर्शनम उक्त्वा उवाच- यावत् ते तव प्रजायाम्, प्रजास तताविर्त्यर्थ, एनम् उद्गीथ त्वत्सततिजा वेदिष्यन्ते ज्ञास्य न्ति, तावन्त काल परोवरीयो हैभ्य प्रसिद्धेभ्यो लौकिक जीवनेभ्य उत्तरोत्तरविशिष्टतर जीवन तेभ्यो भविष्यति ॥
In plain words
Having imparted this vision of the Udgītha to his disciple Udara Śāṇḍilya, [the teacher] said to him: 'O Śaunaka, as far as your descendants know and understand this Udgītha, for that long will their lives be higher and far more exalted than those of ordinary, established worldly people.'
Close to the Sanskrit
O descendant, Śaunaka, having imparted this Udgītha vision to the pupil Udara Śāṇḍilya, he said: As far as in your progeny, your descendants will know and understand this Udgītha, so far will there be for them a higher, successively more excellent life than these well-known worldly lives.