Yeshayah 48:17-18

Thus saith HASHEM, thy Go'el, the Kadosh Yisroel; I am HASHEM Eloheicha thy Melamed (Teacher) of doing that which profiteth, thy Madrikh (Guide, Instructor) in the Derech that thou shouldest go. O if only thou hadst paid heed to My mitzvot! Then had thy shalom been like a nahar, and thy tzedakah as the waves of the yam