כָּל־לְבָב֣וֹ הֵכִ֔ין לִדְר֛וֹשׁ הָאֱלֹהִ֥ים ׀ יְהוָ֖ה אֱלֹהֵ֣י אֲבוֹתָ֑יו וְלֹ֖א כְּטָהֳרַ֥ת הַקֹּֽדֶשׁ׃ (ס)
every one that setteth his heart to seek God, the LORD, the God of his fathers, though [he be] not [cleansed] according to the purification that pertaineth to holy things.’
Read halakhic rulings (Jewish law) on II Chronicles 30:19: and classical halakhic sources.