And in return for King Indra’s benediction that water would increase the volume of other substances with which it was mixed, water accepted one fourth of the sinful reactions. Therefore there are bubbles and foam in water. When one collects water, these should be avoided.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
रजोरूपेण तास्वंहो मासि मासि प्रदृश्यते । द्रव्यभूयोवरेणापस्तुरीयं जगृहुर्मलम्
rajorūpeṇa tāsvaṃho māsi māsi pradṛśyate | dravyabhūyovareṇāpasturīyaṃ jagṛhurmalam
SB 6.9.10