כֹּֽה־אָמַ֨ר יְהוָ֧ה מֶֽלֶךְ־יִשְׂרָאֵ֛ל וְגֹאֲל֖וֹ יְהוָ֣ה צְבָא֑וֹת אֲנִ֤י רִאשׁוֹן֙ וַאֲנִ֣י אַחֲר֔וֹן וּמִבַּלְעָדַ֖י אֵ֥ין אֱלֹהִֽים׃
Thus saith the LORD, the King of Israel, And his Redeemer the LORD of hosts: I am the first, and I am the last, And beside Me there is no God.
Read halakhic rulings (Jewish law) on Isaiah 44:6 from the Mishneh Torah and classical halakhic sources, free online.