Chāndogya Upaniṣad 2.11.2

2.11.2

sa ya evam etad gāyatraṃ prāṇeṣu protaṃ veda \
prāṇī bhavati \
sarvam āyur eti \
jyog jīvati \
mahān prajayā paśubhir bhavati \
mahān kīrtyā \
mahāmanāḥ syāt \
tad vratam \\211.2\

2. He who knows thus this Gāyatrī Sāman as woven upon the vital breaths becomes possessor of vital breaths, reaches a full length of life, lives long, becomes great in offspring and in cattle, great in fame. One should be great-minded. That is his rule.