Ac 9:11 And the Lord said unto him, Arise, and go into the street which is called Straight, and enquire in the house of Judas for one called Saul, of Tarsus: for, behold, he prayeth,
Prayer was the one thing that God used to show Ananias that he had been approved. Saul of Tarsus had prayed many times before, but his former prayers were Pharisee prayers. His praying now was different. It went up to God.