SB 10.51.31

vayaṁ tu puruṣa-vyāghra
 aikṣvākāḥ kṣatra-bandhavaḥ
mucukunda iti prokto
 yauvanāśvātmajaḥ prabho
Synonyms: 
vayam — we; tu — on the other hand; puruṣa — among men; vyāghra — O tiger; aikṣvākāḥ — descendants of Ikṣvāku; kṣatra — of kṣatriyas; bandhavaḥ — family members; mucukundaḥ — Mucukunda; iti — thus; proktaḥ — called; yauvanāśva — of Yauvanāśva (Māndhātā, the son of Yuvanāśva); ātma-jaḥ — the son; prabho — O Lord.
Translation: 
As for ourselves, O tiger among men, we belong to a family of fallen kṣatriyas, descendants of King Ikṣvāku. My name is Mucukunda, my Lord, and I am the son of Yauvanāśva.
Purport: 

It is common in Vedic culture that a kṣatriya will humbly introduce himself as kṣatra-bandhu, a mere relative in a kṣatriya family, or in other words a fallen kṣatriya. In ancient Vedic culture, to claim a particular status on the basis of one’s family relations was itself indicative of a fallen position. Kṣatriyas and brāhmaṇas should be given status according to their merit, by their qualities of work and character. When the caste system in India became degraded, people proudly claimed to be relatives of kṣatriyas or brāhmaṇas, though in the past such a claim, unaccompanied by tangible qualifications, indicated a fallen position.