Srimad Bhagavatam Canto 09, Chapter 02, Text 02

SB 9.2.2

tato ’yajan manur devam
 apatyartham harim prabhum
iksvaku-purvajan putran
 lebhe sva-sadrsan dasa
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Then, because of this desire for sons, the Manu known as Sraddhadeva worshiped the Supreme Lord, the Personality of Godhead, the Lord of the demigods. Thus he got ten sons exactly like himself. Among them all, Iksvaku was the eldest.
Srimad Bhagavatam Canto 09, Chapter 02, Text 01
Srimad Bhagavatam Canto 09, Chapter 02, Text 03