Śrīmad-Bhāgavatam · Text 4.8.1
Who is speaking and story frame
मैत्रेय उवाच
सनकाद्या नारदश्च ऋभुर्हंसोऽरुणिर्यति: ।
नैते गृहान् ब्रह्मसुता ह्यावसन्नूर्ध्वरेतस: ॥ १ ॥
maitreya uvāca
sanakādyā nāradaś ca
ṛbhur haṁso ’ruṇir yatiḥ
naite gṛhān brahma-sutā
hy āvasann ūrdhva-retasaḥ
The great sage Maitreya said: The four great Kumāra sages headed by Sanaka, as well as Nārada, Ṛbhu, Haṁsa, Aruṇi and Yati, all sons of Brahmā, did not live at home, but became ūrdhva-retā, or naiṣṭhika-brahmacārīs, unadulterated celibates.
Read Śrīla Prabhupāda's purport on Vedabase.io