Charles Ellicott Commentary 2 Kings 20:3

"Remember now, O Jehovah, I beseech thee, how I have walked before thee in truth and with a perfect heart, and have done that which is good in thy sight. And Hezekiah wept sore." — 2 Kings 20:3 (ASV)

Remember now how I have walked ... —Hezekiah deprecates an untimely death—the punishment of the wicked (Proverbs 10:27)—on account of his zeal for Jehovah and against the idols. As Thenius remarks, there is nothing surprising in his apparent self-praise if we remember such passages as Psalms 18:20; Psalms 7:8; Nehemiah 13:14. Josephus attributes the poignancy of his sorrow to childlessness, and makes him pray to be spared until he could have a son; but this is merely an instance of that “midrashitic” enlargement of the narrative which we find elsewhere in that historian.