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.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तस्यैवं ददतः शापं श्रुत्वा द्विजकुलाय वै । भृगुः प्रत्यसृजच्छापं ब्रह्मदण्डं दुरत्ययम्
tasyaivaṃ dadataḥ śāpaṃ śrutvā dvijakulāya vai | bhṛguḥ pratyasṛjacchāpaṃ brahmadaṇḍaṃ duratyayam
SB 4.2.27