Mbh 13.99.2a

"'Bhishma said, "In this connection is recited the old narrative of the discourse between Nahusha and Agastya and Bhrigu. The royal sage Nahusha, O monarch, possessed of wealth of penances, acquired the sovereignty of Heaven by his own good deeds. With restrained senses, O king, he dwelt in Heaven, engaged in doing diverse acts of both human and celestial nature. From that high-souled monarch flowed diverse kinds of human acts and diverse kinds of celestial acts also, O chief of men. The diverse rites with respect to the sacrificial fire, the collection of sacred fuel and of Kusa grass, as also of flowers, and the presentation of Vali consisting of food adorned with fried paddy (reduced to powder), and the offer of incense and of light,--all these, O monarch, occurred daily in the abode of that high-souled king while he dwelt in heaven. Indeed, though dwelling in heaven, he performed the sacrifice of Japa (or silent recitation) and the sacrifice of meditation. And, O chastiser of foes, Nahusha, although he had become the chief of the deities, yet worshipped all the deities, as he used to do in days of yore, with due rites and ceremonies. Some time after, Nahusha realised his position as the chief of all the deities. This filled him with pride. From that time all his acts (of the kind spoken of) were suspended. Filled with arrogance in consequence of the boon he had received from all the deities, Nahusha caused the very Rishis to bear him on their shoulders. In consequence, however, of his abstention from all religious acts, his energy began to sustain a diminution. The time was very long for which Nahusha filled with pride, continued to employ the foremost of Rishis, possessed of wealth of penances, as the bearers of his vehicles. He caused the Rishis to discharge by turns his humiliating work. The day came when it was Agastya's turn to bear the vehicles, O Bharata.