It happened the same night, that Yahweh said to him, Take your father's bull, even the second bull seven years old, and throw down the altar of Baal that your father has, and cut down the Asherah that is by it;
"Jehovah said unto him"  (Judges 6:25).  We are not told exactly how God spoke to Gideon, but it might very well have been by the angel of Jehovah who had previously spoken to him.