Visvamitra cursed some of his sons and blessed the others, and he also adopted a son. Thus there were varieties in the Kausika dynasty, but among all the sons, Devarata was considered the eldest

Expressions researched:
"Viśvāmitra cursed some of his sons and blessed the others, and he also adopted a son. Thus there were varieties in the Kauśika dynasty, but among all the sons, Devarāta was considered the eldest"

Srimad-Bhagavatam

SB Canto 9

Viśvāmitra cursed some of his sons and blessed the others, and he also adopted a son. Thus there were varieties in the Kauśika dynasty, but among all the sons, Devarāta was considered the eldest.

SB 9.16.37, Translation

Viśvāmitra cursed some of his sons and blessed the others, and he also adopted a son. Thus there were varieties in the Kauśika dynasty, but among all the sons, Devarāta was considered the eldest.