וְאַבִּיט֙ וְאֵ֣ין עֹזֵ֔ר וְאֶשְׁתּוֹמֵ֖ם וְאֵ֣ין סוֹמֵ֑ךְ וַתּ֤וֹשַֽׁע לִי֙ זְרֹעִ֔י וַחֲמָתִ֖י הִ֥יא סְמָכָֽתְנִי׃
And I looked, and there was none to help, and I beheld in astonishment, and there was none to uphold; therefore Mine own arm brought salvation unto Me, And My fury, it upheld Me.
Ibn Ezra on Isaiah
And I looked, etc. This is a figurative expression; for in fact God does not need that.
Rashi on Isaiah
and I was astounded An expression of keeping silent, and I have already explained it above (57:16): “And He was astounded for there was no intercessor.”