Narada Muni continued: O best of the Pandavas, your two cousins Sisupala and Dantavakra, the sons of your maternal aunt, were formerly associates of Lord Visnu, but because they were cursed by brahmanas, they fell from Vaikuntha to this material world

Expressions researched:
"Nārada Muni continued: O best of the Pāṇḍavas, your two cousins Śiśupāla and Dantavakra, the sons of your maternal aunt, were formerly associates of Lord Viṣṇu, but because they were cursed by brāhmaṇas, they fell from Vaikuṇṭha to this material world"

Srimad-Bhagavatam

SB Canto 7

Nārada Muni continued: O best of the Pāṇḍavas, your two cousins Śiśupāla and Dantavakra, the sons of your maternal aunt, were formerly associates of Lord Viṣṇu, but because they were cursed by brāhmaṇas, they fell from Vaikuṇṭha to this material world.

SB 7.1.33, Translation and Purport

Nārada Muni continued: O best of the Pāṇḍavas, your two cousins Śiśupāla and Dantavakra, the sons of your maternal aunt, were formerly associates of Lord Viṣṇu, but because they were cursed by brāhmaṇas, they fell from Vaikuṇṭha to this material world.

Śiśupāla and Dantavakra were not ordinary demons, but were formerly personal associates of Lord Viṣṇu. They apparently fell to this material world, but actually they came to assist the Supreme Personality of Godhead by nourishing His pastimes within this world.