SB 9.15.16

śrī-rājovāca
kiṁ tad aṁho bhagavato
 rājanyair ajitātmabhiḥ
kṛtaṁ yena kulaṁ naṣṭaṁ
 kṣatriyāṇām abhīkṣṇaśaḥ
Synonyms: 
śrī-rājā uvāca — Mahārāja Parīkṣit inquired; kim — what; tat aṁhaḥ — that offense; bhagavataḥ — unto the Supreme Personality of Godhead; rājanyaiḥ — by the royal family; ajita-ātmabhiḥ — who could not control their senses and thus were degraded; kṛtam — which had been done; yena — by which; kulam — the dynasty; naṣṭam — was annihilated; kṣatriyāṇām — of the royal family; abhīkṣṇaśaḥ — again and again.
Translation: 
King Parīkṣit inquired from Śukadeva Gosvāmī: What was the offense that the kṣatriyas who could not control their senses committed before Lord Paraśurāma, the incarnation of the Supreme Personality of Godhead, for which the Lord annihilated the kṣatriya dynasty again and again?