Mbh 1.225.4a

“Vaisampayana said, ‘O chief of men, I will narrate to you the story of the conflagration of Khandava as told by Rishis in the Purana. It hath been heard, O king, in the Purana that there was a celebrated king of the name of Swetaki who was endued with strength and prowess and who was equal unto Indra himself. No one on earth has equalled him in sacrifices, charity, and intelligence. Swetaki performed the five great sacrifices and many others, at all of which the presents unto Brahmanas were large. The heart of that monarch, O king, was always set upon sacrifices, religious rites, and gifts of all kinds. And king Swetaki of great intelligence, assisted by his Ritwiks performed sacrifices for many long years, till those sacrificial priests with eyes afflicted by the continued smoke and becoming very weak, left that monarch, wishing never more to assist at his sacrifices. The king, however, repeatedly asked those Ritwiks to come to him. But they came not to his sacrifice in consequence of the painful state of their eyes. The king, therefore, invited at the command of his own Ritwiks, others like unto them, and completed the sacrifice that he had begun. After some days had elapsed, king Swetaki desired to perform another sacrifice which should extend for a hundred years. But the illustrious monarch obtained not any priest to assist him in it. The celebrated king then, with his friends and relatives, casting off all sloth, repeatedly courted his priests with great persistence, by bowing down unto them, by conciliatory speeches, and by gifts of wealth. All of them, however, refused to accomplish the purpose which that king of immeasurable energy had in view. Then that royal sage, getting angry, addressed those Brahmanas sitting in their asylums, and said, ‘If, ye Brahmanas, I were a fallen person, or, if, I were wanting in homage and service to you, I should then deserve to be abandoned without scruple by you and by other Brahmanas at the same time.