Numbers 19:17-18

19:17 “‘For a ceremonially unclean person you must take some of the ashes of the heifer burnt for purification from sin and pour fresh running water over them in a vessel. 19:18 Then a ceremonially clean person must take hyssop, dip it in the water, and sprinkle it on the tent, on all its furnishings, and on the people who were there, or on the one who touched a bone, or one killed, or one who died, or a grave.

Psalms 51:7

51:7 Sprinkle me with water and I will be pure;

wash me and I will be whiter than snow.

Ezekiel 36:25

36:25 I will sprinkle you with pure water and you will be clean from all your impurities. I will purify you from all your idols.

Acts 15:9

15:9 and he made no distinction between them and us, cleansing their hearts by faith.

Revelation 7:14

7:14 So I said to him, “My lord, you know the answer.” Then he said to me, “These are the ones who have come out of the great tribulation. They have washed their robes and made them white in the blood of the Lamb!