Leviticus 11:36

Nevertheless a fountain or cistern where water is collected shall be clean; but that which touches their carcase shall be unclean.

Zechariah 13:1

In that time there shall be an open fountain for the house of David and for the inhabitants of Jerusalem against sin and against uncleanness.

John 4:14

but whosoever drinks of the water that I shall give him shall never thirst, but the water that I shall give him shall be in him a fountain of water springing up into 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 time there shall be an open fountain for the house of David and for the inhabitants of Jerusalem against sin and against uncleanness.
John 4:14
but whosoever drinks of the water that I shall give him shall never thirst, but the water that I shall give him shall be in him a fountain of water springing up into eternal life.