Śrīmad-Bhāgavatam · Text 4.2.27
Who is speaking and story frame
तस्यैवं वदत: शापं श्रुत्वा द्विजकुलाय वै ।
भृगु: प्रत्यसृजच्छापं ब्रह्मदण्डं दुरत्ययम् ॥ २७ ॥
tasyaivaṁ vadataḥ śāpaṁ
śrutvā dvija-kulāya vai
bhṛguḥ pratyasṛjac chāpaṁ
brahma-daṇḍaṁ duratyayam
When all the hereditary brāhmaṇas were thus cursed by Nandīśvara, the sage Bhṛgu, as a reaction, condemned the followers of Lord Śiva with this very strong brahminical curse.
Read Śrīla Prabhupāda's purport on Vedabase.io