Isaiah 39:4

“Then said he, what have they seen in thine house? &c.] Coming nearer to the point he had in view, and which was the thing that was displeasing to the Lord; not that he had received the ambassadors, and used them in such a manner as persons in such a quality ought to be used; but that he had shown them what he ought not to have done, and especially from such a principle of pride and vanity as he did: and Hezekiah answered without any reserve, very openly, not suspecting that the prophet was come with a reproof to him, or to blame him, or would blame him for what he had done: all that is in my house have they seen; the several royal apartments, and the furniture of them: there is nothing among…”

“All--a frank confession of his whole fault; the king submits his conduct to the scrutiny of a subject, because that subject was accredited by God. Contrast Asa (Ch2 16:7-10).”

“What have they seen? - It is probable that the fact that Hezekiah had showed them the treasures of his kingdom was known in Jerusalem. Such a fact would be likely to attract attention, and to produce inquiry among the people into the cause. All that is in mine house - Here was the confessions of a frank, an honest, and a pious man. There was no concealment; no disguise. Hezekiah knew that he was dealing with a man of God - a man too to whom he had been under great obligations. He knew that Isaiah had come commissioned by God, and that it would be in vain to attempt to conceal anything. Nor does he seem to have wished to make any concealment. If he was conscious that what he had done had been…”

“All that: Jos 7:19; Job 31:33; Pro 23:5, Pro 28:13; Jo1 1:9 Isaiah 39:5”