Whom she very well knew to be fit for her purpose. In his city, i.e. in Jezreel. So she seeks to destroy him with a pretence of justice, and with as little reflection upon Ahab as might be.
Related Commentaries of 1 Kings 21:8
1 Kings 21:8
8 So she wrote letters in Ahab's name, and sealed them with his seal, and sent the letters unto the elders and to the nobles that were in his city, dwelling with Naboth.