So Gad went to David that day and told him, “Go up and build an altar for the Lord on the threshing floor of Araunah the Jebusite.”

Then the king and his men advanced to Jerusalem ¹  against the Jebusites who lived in the land. The Jebusites ²  said to David, “You cannot invade this place! Even the blind and the lame will turn you back, saying, ‘David cannot invade this place!’”

David said on that day, “Whoever attacks the Jebusites must approach the ‘lame’ and the ‘blind’ who are David’s enemies ¹  by going through the water tunnel.” ²  For this reason it is said, “The blind and the lame cannot enter the palace.” ³ 

When the angel ¹  extended his hand to destroy Jerusalem, the Lord relented from his judgment. ²  He told the angel who was killing the people, “That’s enough! Stop now!” ³  (Now the Lord’s angel was near the threshing floor of Araunah the Jebusite.)