Gāyatrī Mantra
Ṛgveda 3.62.10
tát savitúr váreṇyaṃ bhárgo devásya dhīmahi
dhíyo yó naḥ pracodáyāt
A family book associated with Viśvāmitra; includes the famous Gāyatrī mantra.
Together, the four Vedas form the foundation of Sanātana Dharma (Hinduism) and have been preserved through oral tradition for thousands of years.
tát savitúr váreṇyaṃ bhárgo devásya dhīmahi
dhíyo yó naḥ pracodáyāt