The God of David thy father; I am mindful of my promise made to David and his house, and will make it good in thy person. On the third day; which shows that the cure was miraculous. Thou shalt go up unto the house of the Lord, to give me solemn praise for this mercy; which proves the perfection of the cure.
Related Commentaries of 2 Kings 20:5
2 Kings 20:5
5 Turn again, and tell Hezekiah the captain of my people, Thus saith the LORD, the God of David thy father, I have heard thy prayer, I have seen thy tears: behold, I will heal thee: on the third day thou shalt go up unto the house of the LORD.