Matsya Purana 249.22

249.22

yo na pūjayate bhaktyā pretya ceha vinaśyati.
pālayiṣyāmi vaḥ sarvānadhunā snehamāstitaḥ .. 249.22 ..

Hearing those words of Brahmâ, all the Devas went to Pâtala and said to the demon king Bali,—"Bali! Do not be hostile to us now, we are your slaves Endeavours should be made to churn the milk-ocean for nectar, for which purpose Śêṣa has to be utilised as the string of the churning stick Demon king! we will undoubtedly become immortal by the nectar obtained through your grace" Bali said—"Devas! I shall do what you say I can alone churn the milky ocean I shall certainly acquire nectar to help you to become immortal, because one who does not oblige his enemies that come from far, is ruined in this life as well as in the next I shall therefore give you my full support"—17 22