Leviticus 11:36

Neverthelater, yet the fountains and wells and ponds of water, shall be clean still. But whosoever toucheth their carcasses, shall be unclean.

Zechariah 13:1

In that time shall the house of David and the citizens of Jerusalem have an open well, to wash of sin and uncleanness.

John 4:14

But whosoever shall drink of the water that I shall give him, shall never be more a 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 time shall the house of David and the citizens of Jerusalem have an open well, to wash of sin and uncleanness.
John 4:14
But whosoever shall drink of the water that I shall give him, shall never be more a thirst: But the water that I shall give him, shall be in him a well of water springing up into everlasting life."