These (in SB 10.5.4) are sastric injunctions concerning how one can purify everything according to Vedic civilization. Unless purified, anything we use will infect us with contamination: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.