Mbh 3.190.2

“These, O Yudhishthira, are the courses of the Krita, the Treta, the Dwapara and the succeeding age. I have now narrated to thee everything. I have also told thee, O son of Pandu, the periods embraced by the several Yugas as generally known. I have now told thee everything appertaining to both the past and the future as narrated by Vayu in the Purana (which goes by his name and) which is adored by the Rishis. Being immortal I have many a time beheld and otherwise ascertained the courses of the world. Indeed, all I have seen and felt I have now told thee. And, O thou of unfading glory, listen now with thy brothers to something else I will presently tell thee for clearing thy doubts about religion! O thou foremost of virtuous men, thou shouldst always fix thy soul on virtue, for, O monarch, a person of virtuous soul obtaineth bliss both here and hereafter. And, O sinless one, listen to the auspicious words that I will now speak to thee. Never do thou humiliate a Brahmana, for a Brahmana, if angry, may by his vow destroy the three worlds.”