Matsyapurana 11.40

11.40

manor vaivasvatasyāsan daśa putrā mahābalāḥ
ilas tu prathamasteṣāṃ putreṣṭyāṃ samajāyata //

Vaivasvata Manu had ten powerful sons, the eldest of whom was Ila, who was born by the performance of putreṣṭi sacrifice. His brothers were:—Ikṣwâku, Kuśanâbha, Ariṣṭa, Dhriṣṭa, Nariṣyanta, Karuṣa, Śâryâti, Pṛiṣadhra and Nâbhâga, who were all very valiant and illustrious. Manu, after anointing his son Ila and putting the reins of the Government into his hands, went to practise asceticism in the forest called Mahendravana.—40-42.