en_tn/2sa/24/11.md

the word of Yahweh came to the prophet Gad, David's seer, saying,

The idiom "the word of Yahweh came to" is used to introduce a special message from God. See how you translated this idiom in 2 Samuel 7:4. Alternate translation: "Yahweh gave a message to the prophet Gad, David's seer. He said," or "Yahweh spoke this message to the prophet Gad, David's seer:" (See: rc://en/ta/man/translate/figs-idiom)

David's seer

This means Gad was the official prophet in the royal palace.