The posts of the door, together with the door itself, as if the door was to be removed, and the temple thereby to be exposed to the view and rapine of profane persons. Such violent motions were commonly tokens of God's anger. Him that cried, to wit, the angel, which cried; Isaiah 4:3. Filled with smoke; which elsewhere is a token of God's presence and acceptance, as Exodus 40:34 1 Kings 8:10, but here of his anger, as Psalms 18:8, and elsewhere.
Related Commentaries of Isaiah 6:4
Isaiah 6:4
4 And the posts of the doora moved at the voice of him that cried, and the house was filled with smoke.