One should mentally honor the devotee who chants the holy name of Lord Kṛṣṇa, one should offer humble obeisances to the devotee who has undergone spiritual initiation [dīkṣā] and is engaged in worshiping the Deity, and one should associate with and faithfully serve that Pure devotee who is advanced in undeviated devotional service and whose heart is completely devoid of the propensity to criticize others.
NoI 5
http://vedabase.net/noi/5/en
