Skandapurana 5.111.8

5.111.8

yathā śāpaśca sañjāto brāhmaṇānāṃ mahātmanām..
atha te munayaḥ kruddhāstacchrutvā garhitaṃ vacaḥ ..
rājapratigraho niṃdyastāpasānāṃ viśeṣataḥ..8..

and how the curse of the high-souled brahmins had occurred. / Then those sages, enraged upon hearing those despicable words, [thought:] / “Accepting gifts from a king is blameworthy, especially for ascetics.”