Devibhagavatapurana 4.16.17

4.16.17

tretāyuge raghorvaṃśe rāmo daśarathātmajaḥ |
naranārāyaṇāṃśau dvau jātau bhuvi mahābalau ||

After that the Bhagavân Hari incarnated as Râma, the son of Das’aratha. Next in the twenty-eighth Dvâpara Yuga, He incarnated as the very powerful Arjuna and S’rî Krisna, the Ams’as of Nara Nârâyana. To remove the load of the earth, these two were born; and they fought deadly battles in the battlefield of Kuruksettra. O king! Thus the several incarnations of Hari arose, according to the requirements of Prakriti. O King! These three worlds are under the control of Prakriti.