Śrīmad-Bhāgavatam · Text 6.5.23
Who is speaking and story frame
नाशं निशम्य पुत्राणां नारदाच्छीलशालिनाम् ।
अन्वतप्यत क: शोचन् सुप्रजस्त्वं शुचां पदम् ॥ २३ ॥
nāśaṁ niśamya putrāṇāṁ
nāradāc chīla-śālinām
anvatapyata kaḥ śocan
suprajastvaṁ śucāṁ padam
The Haryaśvas, the sons of Prajāpati Dakṣa, were very well-behaved, cultured sons, but unfortunately, because of the instructions of Nārada Muni, they deviated from the order of their father. When Dakṣa heard this news, which was brought to him by Nārada Muni, he began to lament. Although he was the father of such good sons, he had lost them all. Certainly this was lamentable.
Read Śrīla Prabhupāda's purport on Vedabase.io