Tafsiran Yesaya 8:11: Rashi & Ibn Ezra

with the overwhelming power of prophecy [Lit., with strength of the hand.] When the prophecy became more intensive over me, when He continued to speak concerning this matter, as it is written above (v. 5): “And the Lord continued to speak to me.” And in this language, Ezekiel said, (3: 14): “And the hand of the Lord became strong over me.” This is an expression of prophecy.

For the Lord spake thus to me with a strong hand, that is: When the prophecy came with force upon me; comp. The hand of the Lord was upon me (Ez. 37:1).

and admonished me from going... He warned me not to participate in the counsel of Shebna the scribe and his company, who conspired to rebel against Hezekiah, as is related in Sanhedrin (26a), to which there is an allusion in this Book (below 22:15): “Go, come to this voluptuary, to Shebna who is appointed over the Temple.”

and He admonished me like “and to admonish me.”