TSK · Acts 11:13

He saw in a vision openly, as it were about the ninth hour of the day, an angel of God coming in unto him, and saying to him, Cornelius.

And Cornelius said, Four days ago, until this hour, I was keeping the ninth hour of prayer in my house; and behold, a man stood before me in bright apparel,

Are they not all ministering spirits, sent forth to do service for the sake of them that shall inherit salvation?