SB 8.14.1
sri-rajovaca
manvantaresu bhagavan
yatha manv-adayas tv ime
yasmin karmani ye yena
niyuktas tad vadasva me
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Maharaja Pariksit inquired: O most opulent Sukadeva Gosvami, please explain to me how Manu and the others in each manvantara are engaged in their respective duties, and by whose order they are so engaged.