Chāndogya Upaniṣad 2.20.2

2.20.2

sa ya evam etad rājanaṃ devatāsu protaṃ veda \
etāsām eva devatānāṃ salokatāṃ sarṣṭitāṃ sāyujyaṃ gacchati \
sarvam āyur eti \
jyog jīvati \
mahān prajayā paśubhir bhavati \
mahān kīrtyā \
brāhmaṇān na nindet \
tad vratam \\220.2\

2. He who knows thus this Rājana Sāman as woven upon the divinities goes to the same world, to equality and to complete union (sāyujya) with those very divinities, reaches a full length of life, lives long, becomes great in offspring and in cattle, great in fame. One should not find fault with the Brahmans. That is his rule.