The awful presence returned no answer to the guilty king, but addressed itself to the prophet Gad, and commanded _him_ to bid David go up and build an altar to Jehovah in the threshing-floor of Ornan the Jebusite. The command was a message of mercy. Jehovah permitted David to build Him an altar; He was prepared to accept an offering at his hands. The king's prayers were heard, and Jerusalem was saved from the pestilence. But still the angel stretched out his drawn sword over Jerusalem; he waited till the reconciliation of Jehovah with His people should have been duly ratified by solemn sacrifices. At the bidding of the prophet, David went up to the threshing-floor of Ornan the Jebusite. Sorrow and reassurance, hope and fear, contended for the mastery. No sacrifice could call back to life the seventy thousand victims whom the pestilence had already destroyed, and yet the horror of its ravages was almost forgotten in relief at the deliverance of Jerusalem from the calamity that had all but overtaken it. Even now the uplifted sword might be only back for a time; Satan might yet bring about some heedless and sinful act, and the respite might end not in pardon, but in the execution of God's purpose of vengeance. Saul had been condemned because he sacrificed too soon; now perhaps delay would be fatal. Uzzah had been smitten because he touched the Ark; till the sacrifice was actually offered who could tell whether some thoughtless blunder would not again provoke the wrath of Jehovah? Under ordinary circumstances David would not have dared to sacrifice anywhere except upon the altar of burnt offering before the tabernacle at Gibeon; he would have used the ministry of priests and Levites. But ritual is helpless in great emergencies. The angel of Jehovah with the drawn sword seemed to bar the way to Gibeon, as once before he had barred Balaam's progress when he came to curse Israel. In his supreme need David builds his own altar and offers his own sacrifices; he receives the Divine answer without the intervention this time of either priest or prophet. By God's most merciful and mysterious grace, David's guilt and punishment, his repentance and pardon, broke down all barriers between himself and God.