Bhagavatapurana 6.1.24

6.1.24

tasya pravayasaḥ putrā daśa teṣāṃ tu yo 'vamaḥ /
bālo nārāyaṇo nāmnā pitrośca dayito bhṛśam //

24. By the time he had grown old he had ten sons, the youngest of whom, yet a child called Narayana, was the great pet to his parents.