Hebrews 9:19

for after Moses had announced every command in the Law to all the people, he took the blood of calves and goats, together with water, scarlet wool and hyssop, sprinkling the book and all the people,

Treasury of Scripture Knowledge

Summary

And he spake of trees, from the cedar tree that is in Lebanon even unto the hyssop that springeth out of the wall: he spake also of beasts, and of fowl, and of creeping things, and of fishes.

The hyssop

Bible References

The hyssop

Hebrews 9:19
for after Moses had announced every command in the Law to all the people, he took the blood of calves and goats, together with water, scarlet wool and hyssop, sprinkling the book and all the people,