The person who has not at any time received the dust of the feet of the Lord’s pure devotee upon his head is certainly a dead body. And the person who has never experienced the aroma of the tulasī leaves from the lotus feet of the Lord is also a dead body, although breathing.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
जीवञ्छवो भागवताङ्घ्रिरेणुं न जातु मर्त्योऽभिलभेत यस्तु । श्रीविष्णुपद्या मनुजस्तुलस्याः श्वसञ्छवो यस्तु न वेद गन्धम्
jīvañchavo bhāgavatāṅghrireṇuṃ na jātu martyo'bhilabheta yastu | śrīviṣṇupadyā manujastulasyāḥ śvasañchavo yastu na veda gandham
SB 2.3.23