John Gill Commentary Isaiah 28:22

"Now therefore be ye not scoffers, lest your bonds be made strong; for a decree of destruction have I heard from the Lord, Jehovah of hosts, upon the whole earth." — Isaiah 28:22 (ASV)

Now therefore do not be mockers
At the words of the prophets, and the judgments denounced by them, which is very common, when they are deferred, and not immediately executed: this was the case before the destruction of Jerusalem by the Chaldeans, and one cause of it, (2 Chronicles 36:16) and also by the Romans; see (Acts 13:41) :

lest your bands be made strong ;
punishment become heavier, and more grievous; and so the Syriac version renders it; as prisoners that attempt to make their escape have their bonds and fetters made faster, and so are put to more pain and distress; to which the allusion seems to be, signifying, that by scoffing and mocking at the word of God you would bring upon yourselves greater and sorer punishments, (Hebrews 10:29) :

for I have heard from the Lord GOD of hosts ;
in a vision from him, by a spirit of prophecy, as a secret communicated by him; for whatever the Lord did he usually made it known to his prophets; and it might be depended upon what they said, as being what the Lord had declared in their hearing; see (Amos 3:7) :

a consumption, even determined upon the whole earth :
or, "on the whole land", the land of Judea; for this destruction seems only to respect that; and is the same with "the consummation, and that determined", that should be "poured upon the desolate", (Daniel 9:27) which manifestly designs the destruction of the Jews by the Romans, which was an affair determined by the Lord, whose counsel shall stand, and therefore would surely come to pass.