mala-nirmocanam pumsam
jala-snanam dine dine
sakrd gitamrta-snanam
samsara-mala-nasanam

“One may cleanse himself daily by taking a bath in water, but if one takes a bath even once in the sacred Ganges water of Bhagavad-gita, for him the dirt of material life is altogether vanquished.” (Gita-mahatmya 3)

(Quoted in Srila Prabhupada’s introduction to Bhagavad-gita As It Is)