מים חיים אל כלי, “fresh water into a vessel.” The word כלי here is interpreted as the respective first letters in the words: כהן, לוי, ישראל, i.e. when reading the Torah in public, a representative of each of these categories of Israel is to be called up to the Torah. The expression מים is a euphemism for the word: Torah, (Isaiah 55,1) and the word: חיים , is a euphemism for the Torah which is also known as עץ חיים, “tree of life.” (Proverbs 3,18)