Srimad Bhagavatam Canto 09, Chapter 06, Text 04

SB 9.6.4

ksuvatas tu manor jajñe
 iksvakur ghranatah sutah
tasya putra-sata-jyestha
 vikuksi-nimi-dandakah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The son of Manu was Iksvaku. When Manu was sneezing, Iksvaku was born from Manu’s nostrils. King Iksvaku had one hundred sons, of whom Vikuksi, Nimi and Dandaka were the most prominent.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
According to Sridhara Svami, although the Bhagavatam (9.1.11-12) has previously included Iksvaku among the ten sons begotten by Manu in his wife Sraddha, this was a generalization. It is here specifically explained that Iksvaku was born simply from the sneezing of Manu.
Srimad Bhagavatam Canto 09, Chapter 06, Text 03
Srimad Bhagavatam Canto 09, Chapter 06, Text 05