Leviticus 11:36

Nevertheless a spring or a cistern (reservoir) collecting water shall be clean; but whoever touches one of these carcasses shall be unclean.

Zechariah 13:1

“In that day a fountain shall be opened for the house of David and for the people of Jerusalem for [cleansing from] sin and impurity.

John 4:14

But whoever drinks the water that I give him will never be thirsty again. But the water that I give him will become in him a spring of water [satisfying his thirst for God] welling up [continually flowing, bubbling within him] to eternal life.”

Treasury of Scripture Knowledge

Summary

Nevertheless a fountain or pit, wherein there is plenty of water, shall be clean: but that which toucheth their carcase shall be unclean.

Bible References

A fountain

Zechariah 13:1
“In that day a fountain shall be opened for the house of David and for the people of Jerusalem for [cleansing from] sin and impurity.
John 4:14
But whoever drinks the water that I give him will never be thirsty again. But the water that I give him will become in him a spring of water [satisfying his thirst for God] welling up [continually flowing, bubbling within him] to eternal life.”