Matthew Henry on 1 Chronicles 21:18–end
We have here the controversy concluded, and, upon David's repentance, his peace made with God. Though thou wast angry with me, thy anger is turned away. 1. A stop was put to the progress of the execution, Ch1 21:15. When David repented of the sin God repented of the judgment, and ordered the destroying angel to stay his hand and sheath his sword, Ch1 21:27. 2. Direction was given to David to rear an altar in the threshing-floor of Ornan, Ch1 21:18. The angel commanded the prophet Gad to bring David this direction. The same angel that had, in God's name, carried on the war, is here forward to set on foot the treaty of peace; for angels do not desire the woeful day. The angel could have given…
Read the whole note in the consoleJamieson-Fausset-Brown on 1 Chronicles 21:28
when David saw that the Lord had answered him . . ., he sacrificed there--or, "he continued to sacrifice there." Perceiving his sacrifice was acceptable, he proceeded to make additional offerings there, and seek favor by prayer and expiatory rites; for the dread of the menacing angel destroying Jerusalem while he was absent in the center of worship at Gibeon, especially reverence for the Divine Being, led him to continue his adorations in that place which God (Ch2 3:1) had hallowed by the tokens of His presence and gracious acceptance.
Next: 1 Chronicles Chapter 22
Adam Clarke on 1 Chronicles 21:26
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.
John Gill on 1 Chronicles 21:28
At that time when David saw that the Lord had answered him in the threshing floor Of Ornan the Jebusite,.... The same with Araunah, 2 Samuel 24:16, with some small variation of the letters, and are of the same signification; both signifying the "ornus", as Hillerus (m) observes, the pine tree or ash; see Isaiah 44:14, in whose threshingfloor David now was, and where he had been praying and sacrificing; and God had accepted his prayer, as the Targum, and had answered him, by causing fire to come down on the sacrifice and consume it, and by ordering the angel to put up his sword in its sheath:
then he sacrificed there; again by the priests, and continued to do so, for he had sacrificed there…