O Sūta, those great sages who have completely taken shelter of the lotus feet of the Lord can at once sanctify those who come in touch with them, whereas the waters of the Ganges can sanctify only after prolonged use.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यत्पादसंश्रयाः सूत मुनयः प्रशमायनाः । सद्यः पुनन्त्युपस्पृष्टाः स्वर्धुन्यापोऽनुसेवया
yatpādasaṃśrayāḥ sūta munayaḥ praśamāyanāḥ | sadyaḥ punantyupaspṛṣṭāḥ svardhunyāpo'nusevayā
SB 1.1.15