וַיִּגְּשׁ֣וּ עֲבָדָיו֮ וַיְדַבְּר֣וּ אֵלָיו֒ וַיֹּאמְר֗וּ אָבִי֙ דָּבָ֣ר גָּד֗וֹל הַנָּבִ֛יא דִּבֶּ֥ר אֵלֶ֖יךָ הֲל֣וֹא תַעֲשֶׂ֑ה וְאַ֛ף כִּֽי־אָמַ֥ר אֵלֶ֖יךָ רְחַ֥ץ וּטְהָֽר׃
And his servants came near, and spoke unto him, and said: ‘My father, if the prophet had bid thee do some great thing, wouldest thou not have done it? how much rather then, when he saith to thee: Wash, and be clean?’
Read halakhic rulings (Jewish law) on II Kings 5:13 from the Mishneh Torah and classical halakhic sources, free online.