Leviticus 14:4

14:4 then the priest will command that two live clean birds, a piece of cedar wood, a scrap of crimson fabric, and some twigs of hyssop be taken up for the one being cleansed.

Leviticus 14:6

14:6 Then he is to take the live bird along with the piece of cedar wood, the scrap of crimson fabric, and the twigs of hyssop, and he is to dip them and the live bird in the blood of the bird slaughtered over the fresh water,

Leviticus 14:49

14:49 Then he is to take two birds, a piece of cedar wood, a scrap of crimson fabric, and some twigs of hyssop to decontaminate the house,

Psalms 51:7

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

wash me and I will be whiter than snow.

Isaiah 1:18

1:18 Come, let’s consider your options,” says the Lord.

“Though your sins have stained you like the color red,

you can become white like snow;

though they are as easy to see as the color scarlet,

you can become white like wool.

Hebrews 9:19-23

9:19 For when Moses had spoken every command to all the people according to the law, he took the blood of calves and goats with water and scarlet wool and hyssop and sprinkled both the book itself and all the people, 9:20 and said, “This is the blood of the covenant that God has commanded you to keep.” 9:21 And both the tabernacle and all the utensils of worship he likewise sprinkled with blood. 9:22 Indeed according to the law almost everything was purified with blood, and without the shedding of blood there is no forgiveness. 9:23 So it was necessary for the sketches of the things in heaven to be purified with these sacrifices, but the heavenly things themselves required better sacrifices than these.