Parallel
Numbers 5:17
Brenton's English Septuagint · Berean Standard Bible
And the priest shall take pure running water in an earthen vessel, and he shall take of the dust that is on the floor of the tabernacle of witness, and the priest having taken it shall cast it into the water.
Then he is to take some holy water in a clay jar and put some of the dust from the tabernacle floor into the water.