John Gills Exposition of the Bible Commentary - 2 Samuel 24:19
And David, according to the saying of Gad, went up as the Lord commanded. From the place where he was in a lower part of the city to Mount Moriah, on which was the threshing floor, a place fit for winnowing corn when threshed. read more
Matthew Henry's Complete Commentary - 2 Samuel 24:18-25
Here is, I. A command sent to David to erect an altar in the place where he saw the angel, 2 Sam. 24:18. This was to intimate to David, 1. That, upon his repeated submission and humiliation, God was now thoroughly reconciled to him; for, if the Lord had been pleased to kill him, he would not have accepted an offering, and therefore would not have ordered him to build an altar. God's encouraging us to offer to him spiritual sacrifices is a comfortable evidence of his reconciling us to himself.... read more