Numbers 19 instructed the ancient Hebrews on a water of purification/cleansing with ingredients including hyssop. Today, science has discovered the antiviral, antimicrobial and antioxidant properties of hyssop. God wins once again. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6270679/

Hyssopus officinalis is native to the Middle East and hyssop has been used for its medicinal properties since ancient times. Anyone who tries to say hyssop in the Bible is some other plant is ignoring what all translations and historical practices say and demonstrate.