Mbh 1.64.4

“And, O bull of the Bharata race, when such was the blessed state of the terrestrial world, the Asuras, O lord of men, began to be born in kingly lines. And the sons of Diti (Daityas) being repeatedly defeated in war by the sons of Aditi (celestials) and deprived also of sovereignty and heaven, began to be incarnated on the earth. And, O king, the Asuras being possessed of great powers, and desirous of sovereignty began to be born on earth amongst various creatures, such as kine, horses, asses, camels, buffaloes, among creatures such as Rakshasas and others, and among elephants and deer. And, O protector of the earth, owing to those already born and to those that were being born, the earth became incapable of supporting herself. And amongst the sons of Diti and of Danu, cast out of heaven, some were born on the earth as kings of great pride and insolence. Possessed of great energy, they covered the earth in various shapes. Capable of oppressing all foes, they filled the earth having the ocean for its boundaries. And by their strength they began to oppress Brahmanas and Kshatriyas and Vaisyas and Sudras and all other creatures also. Terrifying and killing all creatures, they traversed the earth, O king, in bands of hundreds and thousands. Devoid of truth and virtue, proud of their strength, and intoxicated with (the wine of) insolence, they even insulted the great Rishis in their hermitages.