Cross reference
Leviticus 11:36
36 `Only -- a fountain or pit, a collection of water, is clean, but that which is coming against their carcase is unclean;
Zechariah 13:1
1 In that day there is a fountain opened To the house of David And to the inhabitants of Jerusalem, For sin and for impurity.
John 4:14
14 but whoever may drink of the water that I will give him, may not thirst -- to the age; and the water that I will give him shall become in him a well of water, springing up to life age-during.'