A Midrash interpreted the words, "And he spoke of trees, from the cedar that is in Lebanon even to the hyssop that springs out of the wall," in to teach that Solomon interpreted the requirement in to use cedar wood and hyssop to purify those stricken with skin disease. Solomon asked why the person stricken with skin disease was purified by means of the tallest and lowest of trees. And Solomon answered that the person's raising himself up like a cedar caused him to be smitten with skin disease, but making himself small and humbling himself like the hyssop caused him be healed.