One verse

Srimad Bhagavatam 9.23.33

9.23.33

तेषां तु षट्‍प्रधानानां पृथुश्रवस आत्मज: । धर्मो नामोशना तस्य हयमेधशतस्य याट् ॥ ३३ ॥

tesam tu sat pradhananam prthusravasa atmajah dharmo namosana tasya hayamedha-satasya yat

tesam
out of so many sons
tu
but
sat pradhananam
of whom there were six foremost sons
prthusravasah
of Prthusrava
atmajah
the son
dharmah
Dharma
nama
by the name
usana
Usana
tasya
his
hayamedha-satasya
of one hundred asvamedha sacrifices
yat
he was the performer.

Among these many sons, six were the foremost, such as Prthusrava and Prthukirti. The son of Prthusrava was known as Dharma, and his son was known as Usana. Usana was the performer of one hundred horse sacrifices.