Charles Ellicott Commentary 2 Chronicles 32:20

"And Hezekiah the king, and Isaiah the prophet the son of Amoz, prayed because of this, and cried to heaven." — 2 Chronicles 32:20 (ASV)

For this cause. — Upon this (‘al zôth). The reference is to the Assyrian blasphemies against Jehovah, which Hezekiah urged in his prayer for deliverance (2 Kings 19:16), and to which Isaiah referred in his prophetic answer (Isaiah 37:23). The prayer of Hezekiah is given in 2 Kings 19:15–19 and Isaiah 37:15-20. The parallel passages do not say that Isaiah also prayed, but 2 Kings 19:2–4 and Isaiah 37:2-4 report that the king sent a deputation of nobles to the prophet, requesting his prayers for the remnant that were left.

Cried to heaven. — Compare 2 Chronicles 30:27; 1 Samuel 5:12.