Bhagavatapurana 9.17.8

9.17.8

alarkāt santatistasmāt sunītho 'tha niketanaḥ /
dharmaketuḥ sutastasmāt satyaketurajāyata //

7. & 8. O king, no other king than Alarka retained his youthfulness and ruled the earth for sixty-six thousand years. To Alarka was born a son called Santati (Sannati) of whom Suneetha was the son; and of this, Suketana; his son was Dharmaketu of whom Satyaketu was born.