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सायं प्रातरुपासीत गुर्वग्न्यर्कसुरोत्तमान् ।
सन्ध्ये उभे च यतवाग् जपन्ब्रह्म समाहितः ॥ २ ॥

At both junctions of day and night, namely, in the early morning and in the evening, he should be fully absorbed in thoughts of the spiritual master, fire, the sun-god and Lord Visnu and by chanting the Gayatri mantra he should worship them.

sayam pratar upasita

gurv-agny-arka-surottaman

sandhye ubhe ca yata-vag

japan brahma samahitah

sayam-in the evening; pratah-in the morning; upasita-he should worship; guru-the spiritual master; agni-the fire (by a fire sacrifice); arka-the sun; sura-uttaman-and Lord Visnu, Purusottama, the best of personalities; sandhye-morning and evening; ubhe-both; ca-also; yata-vak-without talking, being silent; japan-murmuring; brahma-the Gayatri mantra; samahitah-being fully absorbed.