Adam Clarke on Isaiah 63:16

Our Redeemer; thy name is from everlasting "O deliver us for the sake of thy name" - The present text reads, as our translation has rendered it, "Our Redeemer, thy name is from everlasting." But instead of מעולם meolam, from everlasting, an ancient MS. has למען lemaan, for the sake of, which gives a much better sense. To show the impropriety of the present reading, it is sufficient to observe, that the Septuagint and Syriac translators thought it necessary to add עלינו aleynu, upon us, to make out the sense; That is, "Thy name is upon us, or we are called by thy name, from of old." And the Septuagint have rendered גאלנו goalenu, in the imperative mood, ῥυσαι ἡμας, deliver us. - L.