Matsya Purana 50.61

50.61

kṣatrasya vijayaṃ jñātvā tataḥ prabhṛti sarvaśaḥ.
ābhagamya sthitāścaiva nṛpañca janamejayam.. 50.60 ..

Thus all the subjects, seeing the Victory of Kṣatriyas over the Brâhmaṇâs, flocked round the King Janamejaya. From that day’s curse the priests officiating at sacrifices performed by Kṣatriyas began to decline and refused to attend on occasions of their sacrifices.—60-61.