Unless they smear upon their bodies the dust of the lotus feet of a Vaiṣṇava completely freed from material contamination, persons very much inclined toward materialistic life cannot be attached to the lotus feet of the Lord, who is glorified for His uncommon activities. Only by becoming Kṛṣṇa conscious and taking shelter at the lotus feet of the Lord in this way can one be freed from material contamination.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
नैषां मतिस्तावदुरुक्रमाङ्घ्रिं स्पृशत्यनर्थापगमो यदर्थः । महीयसां पादरजोऽभिषेकं निष्किञ्चनानां न वृणीत यावत्
naiṣāṃ matistāvadurukramāṅghriṃ spṛśatyanarthāpagamo yadarthaḥ | mahīyasāṃ pādarajo'bhiṣekaṃ niṣkiñcanānāṃ na vṛṇīta yāvat
SB 7.5.32