Śrīmad-Bhāgavatam 3.21.6
SB 3.21.6
Open the full passageSanskrit
maitreya uvāca prajāḥ sṛjeti bhagavān kardamo brahmaṇoditaḥ sarasvatyāṁ tapas tepe sahasrāṇāṁ samā daśa
Translation
The great sage Maitreya replied: Commanded by Lord Brahmā to beget children in the worlds, the worshipful Kardama Muni practiced penance on the bank of the River Sarasvatī for a period of ten thousand years.