Śrīmad-Bhāgavatam · Text 10.69.15
Who is speaking and story frame
तस्यावनिज्य चरणौ तदप: स्वमूर्ध्ना
बिभ्रज्जगद्गुरुतमोऽपि सतां पतिर्हि ।
ब्रह्मण्यदेव इति यद्गुणनाम युक्तं
तस्यैव यच्चरणशौचमशेषतीर्थम् ॥ १५ ॥
tasyāvanijya caraṇau tad-apaḥ sva-mūrdhnā
bibhraj jagad-gurutamo ’pi satāṁ patir hi
brahmaṇya-deva iti yad guṇa-nāma yuktaṁ
tasyaiva yac-caraṇa-śaucam aśeṣa-tīrtham
The Lord bathed Nārada’s feet and then put the water on His own head. Although Lord Kṛṣṇa is the supreme spiritual authority of the universe and the master of His devotees, it was proper for Him to behave in this way, for His name is Brahmaṇya-deva, “the Lord who favors the bṛāhmaṇas.” Thus Śrī Kṛṣṇa honored the sage Nārada by bathing his feet, even though the water that bathes the Lord’s own feet becomes the Ganges, the ultimate holy shrine.
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.