SB 10.10.1

śrī-rājovāca
kathyatāṁ bhagavann etat
 tayoḥ śāpasya kāraṇam
yat tad vigarhitaṁ karma
 yena vā devarṣes tamaḥ
Synonyms: 
śrī-rājā uvāca — the King further inquired; kathyatām — please describe; bhagavan — O supremely powerful one; etat — this; tayoḥ — of both of them; śāpasya — of cursing; kāraṇam — the cause; yat — which; tat — that; vigarhitam — abominable; karma — act; yena — by which; — either; devarṣeḥ tamaḥ — the great sage Nārada became so angry.
Translation: 
King Parīkṣit inquired from Śukadeva Gosvāmī: O great and powerful saint, what was the cause of Nalakūvara’s and Maṇigrīva’s having been cursed by Nārada Muni? What did they do that was so abominable that even Nārada, the great sage, became angry at them? Kindly describe this to me.