आपः शुद्धा भूमिगता वैतृष्ण्यं यासु गोर्भवेत् । अव्याप्ताश्चेदमेध्येन गन्धवर्णरसान्विताः ॥ १२८ ॥
sanskrit
Water, sufficient (in quantity) in order to slake the thirst of a cow, possessing the (proper) smell, colour, and taste, and unmixed with impure substances, is pure, if it is collected on (pure) ground.
english translation