ŚiraUpan, 1, 35.8 atha kasmād ucyate vaidyutaṃ yasmād uccāryamāṇa eva vyakte mahati tamasi dyotayati tasmād ucyate vaidyutam /

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 /

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 /