Caitanya-caritāmṛta 16.60
bhakta-pada-dhūli āra bhakta-pada-jala bhakta-bhukta-avaśeṣa, — tina mahā-bala
[bhakta-pada-dhooli aara bhakta-pada-jala bhakta-bhukta-avashesha, — tina mahaa-bala]
Blended reading (Sanskrit + English inline)
bhakta-pada-dhūli āra bhakta-pada-jala bhakta-bhukta-avaśeṣa, — tina mahā-bala
The dust of the feet of a devotee, the water that has washed the feet of a devotee, and the remnants of food left by a devotee are three very powerful substances.
My note
Source: vedabase.io