Śrīmad-Bhāgavatam 5.24.25
Blended reading (Sanskrit + English inline)
Śrī Caitanya Mahāprabhu has instructed that an unalloyed devotee should consider himself a servant of the servant of the servant of the Supreme Lord ( gopī-bhartuḥ pāda-kamalayor dāsa-dāsānudāsaḥ ). In Vaiṣṇava philosophy, one should not even become a direct servant. Prahlāda Mahārāja was offered all the blessings of an opulent position in the material world and even the liberation of merging into Brahman, but he refused all this. He simply wanted to engage in the service of the servant of the servant of the Lord. Therefore Bali Mahārāja said that because his grandfather Prahlāda Mahārāja had rejected the blessings of the Supreme Personality of Godhead in terms of material opulence and liberation from material bondage, he truly understood his self-interest.
My note
Source: vedabase.io