He will be great in the sight of the Lord. He will refuse to drink wine or other alcoholic drink. He will be filled with the Holy Spirit even before he's born.
So Ananias left and went to the house. He placed his hands on Saul. “Brother Saul,” he said, “The Lord Jesus, who appeared to you on the road as you were traveling here, has sent me so you can regain your sight and be filled with the Holy Spirit.”