Luke
Acts 11:13BSB·traditional attribution
He told us how he had seen an angel standing in his house and saying, ‘Send to Joppa for Simon who is called Peter.
Matthew Henry Presbyterian
The preaching of the gospel to Cornelius was a thing which we poor sinners of the Gentiles have reason to reflect upon with a great deal of joy and thankfulness; for it was the bringing of light to us who sat in darkness.
Commenting on Acts 11:1-18
John Gill Reformed Baptist
And he showed us how he had seen an angel in his house,.... The clause, "in his house", is very appropriately put; for since an angel had entered into his house, it could not be criminal in Peter, and the six brethren, to follow him.
Jamieson-Fausset-Brown Reformed
seen an angel--literally, "the angel," for the rumor took that definite shape.