Śrīmad-Bhāgavatam · Text 10.70.6
Who is speaking and story frame
अथाप्लुतोऽम्भस्यमले यथाविधि
क्रियाकलापं परिधाय वाससी ।
चकार सन्ध्योपगमादि सत्तमो
हुतानलो ब्रह्म जजाप वाग्यत: ॥ ६ ॥
athāpluto ’mbhasy amale yathā-vidhi
kriyā-kalāpaṁ paridhāya vāsasī
cakāra sandhyopagamādi sattamo
hutānalo brahma jajāpa vāg-yataḥ
That most saintly of personalities would then bathe in sanctified water, dress Himself in lower and upper garments and perform the entire sequence of prescribed rituals, beginning with worship at dawn. After offering oblations into the sacred fire, Lord Kṛṣṇa would silently chant the Gāyatrī mantra.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.