Psalms 51:7
My you purify me from sin with hyssop, that I may be clean;
May you wash me, that I may become whiter even that snow.
http://www.hyssopherb.com/
I did some work for Dr. Southall about 8 years ago and he turned me on to this. He has written a book on it. Since using it myself back then I have seen amazing things happen to my body. The most notable is that all my birthmarks, freckles and scars have disappeared over the years. And after the first 2 years using it I don't tan or burn in the sun. I spent 10 hours in the Georgia, summer sun for weeks on end working in my yard with no shirt on and was still white as a sheet.. no suntan lotion at all !!
I grow my own hyssop now and make all these items myself from the herb I grow. It is listed in the Bible a number of times. Not oddly enough, the Jewish old book contain more refs to it than a Christian version. It is also extensively found used in oriental, Indian and American native medicines.
..J