Hesabu 5 : 17 Numbers chapter 5 verse 17

kisha kuhani atatwaa maji matakatifu katika chombo cha udongo; kisha kuhani atatwaa katika vumbi lililo pale chini ya maskani, na kulitia katika hayo maji;
soma Mlango wa 5

and the priest shall take holy water in an earthen vessel; and of the dust that is on the floor of the tabernacle the priest shall take, and put it into the water.