Srimad Bhagvata Mahapurana: Book 11: Chapter 11: Verses 47-49
He who worships Me as aforesaid with a concentratedmind through (Vedic) sacrifices and acts of pious liberality (such as the gift of food; enjoined in the Smrtis) attains true devotion to Me and through service to the righteous follows My (constant) remembrance (or realization too). Ordinarily there is no royal road (to My realization) other than the discipline of Devotion preceded by association with the righteous, 0 Uddhava; for I am the greatest resort of the righteous. Therefore, hear this (following) sovereign secret, 0 scion of Yadu I I shall tell you even that which deserves to be scrupulously guarded; (for) you are My servant and sincere friend.
Thus ends the eleventh discourse in Book Eleven of the great and glorious
Bhagavata-Purana, otherwise known as the Paramahamsa-Samhita.