Charles Ellicott Commentary 2 Samuel 24:11

"And when David rose up in the morning, the word of Jehovah came unto the prophet Gad, David`s seer, saying," — 2 Samuel 24:11 (ASV)

For when David. —Read, and when. There is no suggestion in the original, as seems to be implied in the English, that David’s repentance was in consequence of the visit of Gad; on the contrary, it was in consequence of his repentance and confession that the prophet was sent to him.

The prophet Gad. —This prophet has not been mentioned since his warning to David to return from the land of Moab (1 Samuel 22:5); but he had probably been all along one of David’s counsellors. From 1 Chronicles 29:29 it is not unlikely that this account was written by Gad.