אַף־יָדִי֙ יָ֣סְדָה אֶ֔רֶץ וִֽימִינִ֖י טִפְּחָ֣ה שָׁמָ֑יִם קֹרֵ֥א אֲנִ֛י אֲלֵיהֶ֖ם יַעַמְד֥וּ יַחְדָּֽו׃
我的手也奠定了地的根基，我的右手鋪張了天；我一呼喚它們，它們就一同站立。
Ibn Ezra
ידי Mine hand. My left hand.18From the word ימיני My right hand, which follows in the second sentence of the verse, I. E. probably inferred that the general term ידי is here used for שמאלי My left hand.
Ibn Ezra
It is a figurative expression; the right hand is used in connection with the heavens, because they are higher in rank than the earth.
Ibn Ezra
אף has in this verse the same meaning as כי for.—It is true that I am the first and last, because I created every thing.