Numbers 5:11-31
It details how a husband can "test" his wife with the Bitter Water-if she miscarries it was a bastard, if she's "innocent" it doesn't do anything.
The version I saw has "16 “‘The priest shall bring her and have her stand before the Lord. 17 Then he shall take some holy water in a clay jar and put some dust from the tabernacle floor into the water". Presumably this is the recipe though there's probably other versions with some more details.
I watched Men in Tights recently, recreate the intro with the burning screen.