Numbers 19:6

The priest will take some cedar wood, a hyssop sprig, and some red yarn and throw them onto the burning cow.

Leviticus 14:4

the priest will order that two ritually clean birds be brought, along with a piece of cedar wood, a red cord, and a sprig of hyssop.

Leviticus 14:6

He will take the other bird and dip it, together with the cedar wood, the red cord, and the hyssop, in the blood of the bird that was killed.

Leviticus 14:49

He shall take two birds, some cedar wood, a red cord, and a sprig of hyssop to purify the house.

Psalm 51:7

Purify me from sin with hyssop, and I will be clean. Wash me, and I will be whiter than snow.

Isaiah 1:18

Come now, let us reason together (make things right) (correct matters) between us! Says Jehovah. Though your sins are like scarlet, they will become as white as snow. Though they are red like crimson, they will become as white as wool.

Hebrews 9:19-23

When Moses had spoken every precept to all the people according to the Law, he took the blood of calves and of goats, with water, and scarlet wool, and hyssop, and sprinkled both the book, and all the people,

Treasury of Scripture Knowledge

Summary

And the priest shall take cedar wood, and hyssop, and scarlet, and cast it into the midst of the burning of the heifer.

Bible References

General references

Leviticus 14:4
the priest will order that two ritually clean birds be brought, along with a piece of cedar wood, a red cord, and a sprig of hyssop.
Psalm 51:7
Purify me from sin with hyssop, and I will be clean. Wash me, and I will be whiter than snow.
Isaiah 1:18
Come now, let us reason together (make things right) (correct matters) between us! Says Jehovah. Though your sins are like scarlet, they will become as white as snow. Though they are red like crimson, they will become as white as wool.
Hebrews 9:19
When Moses had spoken every precept to all the people according to the Law, he took the blood of calves and of goats, with water, and scarlet wool, and hyssop, and sprinkled both the book, and all the people,