Verse 15. - And Hezekiah gave him all the silver that was found in the house of the Lord, and in the treasures of the king's house. Ahaz had exhausted both these stores of wealth about thirty years previously (2 Kings 16:8), and there could not have been very much accumulation since. Hence the stripping of the metal-plating from off the temple doors (see the next verse).
18:9-16 The descent Sennacherib made upon Judah, was a great calamity to that kingdom, by which God would try the faith of Hezekiah, and chastise the people. The secret dislike, the hypocrisy, and lukewarmness of numbers, require correction; such trials purify the faith and hope of the upright, and bring them to simple dependence on God.
And Hezekiah gave him all the silver that was found in the house of the Lord, and in the treasures of the king's house. To make up the three hundred talents of silver, for which purpose he exhausted both, which had been done more than once before by the kings of Judah; these were their resources in times of distress; see 2 Kings 12:18.