John Gill Commentary Isaiah 7:7

"thus saith the Lord Jehovah, It shall not stand, neither shall it come to pass." — Isaiah 7:7 (ASV)

Thus saith the Lord GOD, it shall not stand
That is, the counsel they had taken against Judah to vex it, make a breach in it, and set a king of their own liking over it; so the Septuagint and Arabic versions render the words, "that counsel shall not stand"; the counsel of God shall stand, but not the counsel of men, when it is against him, (Proverbs 19:21) (Isaiah 46:10) : neither shall it come to pass ;
or "shall not be"; so far from standing, succeeding, and going forward, till it is brought to a final accomplishment, it should not take footing, or have a being.