Leviticus 11:36

Nevertheless a spring or a cistern collecting water shall be clean, though the one who touches their carcass shall be unclean.

Zechariah 13:1

“In that day a fountain will be opened for the house of David and for the inhabitants of Jerusalem, for sin and for impurity.

John 4:14

but whoever drinks of the water that I will give him shall never thirst; but the water that I will give him will become in him a well of water springing up 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 will be opened for the house of David and for the inhabitants of Jerusalem, for sin and for impurity.
John 4:14
but whoever drinks of the water that I will give him shall never thirst; but the water that I will give him will become in him a well of water springing up to eternal life.”