ṚV, 10, 28, 11.1 tebhyo godhā ayathaṃ karṣad etad ye brahmaṇaḥ pratipīyanty annaiḥ /

ŚiraUpan, 1, 44.2 ucchvasite tamo bhavati tamasa āpo 'psv aṅgulyā mathite mathitaṃ śiśire śiśiraṃ mathyamānaṃ phenaṃ bhavati phenād aṇḍaṃ bhavaty aṇḍād brahmā bhavati brahmaṇo vāyuḥ vāyor oṃkāraḥ oṃkārāt sāvitrī sāvitryā gāyatrī gāyatryā lokā bhavanti /