אֵ֥ין כָּאֵ֖ל יְשֻׁר֑וּן רֹכֵ֤ב שָׁמַ֙יִם֙ בְעֶזְרֶ֔ךָ וּבְגַאֲוָת֖וֹ שְׁחָקִֽים׃
ניטאָ אַזאַ װי גאָט, ישורון; ער רײַט אױף די הימלען דיר צו הילף, און אין זײַן גרױסקײט אױף די װאָלקן.
Rashi
אין כאל ישרון THERE IS NONE LIKE GOD, O JESHURUN — Know, O Israel, that there is none like God among all the gods of the peoples, and that their rock is not as your Rock.
Da'at Zekenim
אין כאל ישורון, “there is none like G–d, Yeshurun; now Moses addresses his words to the whole people of Israel, telling them to serve the Lord with all their heart. They are to fortify their reverence for the Lord. After all, there is no Power comparable to their Lord. There is no other source of help comparable to Him. He rules over all creatures be they in heaven or on earth.
Ibn Ezra
O Jeshurun, there is none like God Moshe returns to an all-inclusive blessing [cf. comment on: 2].