Having lamented over them and sufficiently offered Ganges water, they bathed in the Ganges, whose water is sanctified due to being mixed with the dust of the lotus feet of the Lord.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
ते निनीयोदकं सर्वे विलप्य च भृशं पुनः । आप्लुता हरिपादाब्जरजःपूतसरिज्जले
te ninīyodakaṃ sarve vilapya ca bhṛśaṃ punaḥ | āplutā haripādābjarajaḥpūtasarijjale
SB 1.8.2