The Great Epic of the Bhārata dynasty 13.49.19

13.49.19

yudhiṣṭhira uvāca |
kīdṛśaḥ kṛtakaḥ putraḥ saṃgrahādeva lakṣyate |
śukraṃ kṣetraṃ pramāṇaṃ vā yatra lakṣyeta bhārata || 19 ||

"Yudhishthira said, 'What kind of a son is that who is said to be a made son and whose sonship arises from the fact of his being taken and brought up and in whose case neither the vital seed nor the soil of birth, O Bharata, is regarded as the cause of sonship?'