Acts 5:19

"Angel" (Gr. angelos) means messenger. Wherever this word occurs, the context usually determines whether the messenger is a human being or a spirit being. Luke did not identify which kind of messenger God used here. His point was that the Lord secured the apostles’ release. The messenger’s message had a very authoritative ring, so probably he was a spirit being (cf. Acts 12:6-10; Acts 16:26-27). This is one of three "jail door miracles" that Luke recorded in Acts (cf. Peter in Acts 12:6-11; and Paul and Silas in Acts 16:26-27).