So David went up at the word of Gad, which he had spoken in the name of the LORD.
1 Chronicles 21:19
Surrounding context
21:18 Therefore, the angel of the LORD commanded Gad to say to David that David should go and erect an altar to the LORD on the threshing floor of Ornan the Jebusite.
21:19 So David went up at the word of Gad, which he had spoken in the name of the LORD.
21:20 Now Ornan turned and saw the angel; and his four sons who were with him hid themselves, but Ornan continued threshing wheat.