He answered him - by fire - In answer to David's prayers, God, to show that he had accepted him, and was now pacified towards him and the people, sent fire from heaven and consumed the offerings.

the Lord

1 Chronicles 21:15,16 And God sent an angel to Jerusalem to destroy it: and as he was destroying, the LORD beheld, and he repented him of the evil...

2 Samuel 24:16 And when the angel stretched out his hand on Jerusalem to destroy it, the LORD repented him of the evil...

Psalm 103:20 Bless the LORD, you his angels, that excel in strength, that do his commandments, hearkening to the voice of his word.

Hebrews 1:14 Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?

he put

1 Chronicles 21:12,20 Either three years' famine; or three months to be destroyed before your foes, while that the sword of your enemies overtakes you...

Jeremiah 47:6 O you sword of the LORD, how long will it be ere you be quiet? put up yourself into your scabbard, rest, and be still.

Ezekiel 21:30 Shall I cause it to return into his sheath? I will judge you in the place where you were created, in the land of your nativity.

Matthew 26:52 Then said Jesus to him, Put up again your sword into his place: for all they that take the sword shall perish with the sword.

John 18:11 Then said Jesus to Peter, Put up your sword into the sheath: the cup which my Father has given me, shall I not drink it?

The Hardening in the Sacred Scripture.
"He hath hardened their heart."-- John xii. 40. The Scripture teaches positively that the hardening and "darkening of their foolish heart" is a divine, intentional act. This is plainly evident from God's charge to Moses concerning the king of Egypt: "Thou shalt speak all that I command thee; and I will harden Pharaoh's heart, and multiply My signs and wonders in the land of Egypt. But Pharaoh shall not harken unto you, and I will lay My hand upon Egypt, and the Egyptians shall know that I am the …
Abraham Kuyper—The Work of the Holy Spirit