Acts 11:13
"And he shewed us how he had seen an angel in his house, which stood and said unto him, Send men to Joppa, and call for Simon, whose surname is Peter;"
Cross References (ranked by relevance)
And when Peter was come to himself, he said, Now I know of a surety, that the LORD hath sent his angel, and hath delivered me out of the hand of Herod, and from all the expectation of the people of the Jews.
And it came to pass, that he tarried many days in Joppa with one Simon a tanner.
And they said, Cornelius the centurion, a just man, and one that feareth God, and of good report among all the nation of the Jews, was warned from God by an holy angel to send for thee into his house, and to hear words of thee.
Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?