Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 19
Sanskrit:
स्वर्गापवर्गयो: पुंसां रसायां भुवि सम्पदाम् ।सर्वासामपि सिद्धीनां मूलं तच्चरणार्चनम् ॥ १९ ॥
ITRANS:
svargāpavargayoḥ puṁsāṁrasāyāṁ bhuvi sampadāmsarvāsām api siddhīnāṁmūlaṁ tac-caraṇārcanam
Translation:
Devotional service to His lotus feet is the root cause of all the perfections a person can find in heaven, in liberation, in the subterranean regions and on earth.