v. 28
David perceives that has “answered” him at Ornan’s threshing floor, and he responds by offering sacrifices there.
v. 29
A background clarification: the tent made in the wilderness and the primary burnt-offering altar are, at that time, located at the high place in Gibeon.
v. 30
Despite Gibeon’s standing facilities, David does not go there to inquire, because he is afraid on account of the angel’s sword.