Leviticus 11:36

But a fountain or pit, with a collection of water, shall be clean. But that which touches their dead body shall be unclean.

Zechariah 13:1

In that day there shall be a fountain opened to the house of David, and to the people of Jerusalem, for sin and for uncleanness.

John 4:14

but whoever 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 well of water springing up into everlasting 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 there shall be a fountain opened to the house of David, and to the people of Jerusalem, for sin and for uncleanness.
John 4:14
but whoever 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 well of water springing up into everlasting life.