As we continue to work our way through the book of Acts, we are not going to spend very much time on the retelling in verses 4-14. But we are not setting this repetition aside as unimportant because Luke obviously intends to emphasize it. He wants us to note it. He tells the story in chapter 10, and then repeats it in detail in chapter 11. Then there is a strong reference to this episode at the Jerusalem Council later (Acts 15:7-11). This incident was a significant event.
We can note a few additional details we learn in this recounting. We learn that six Jews accompanied Peter from Joppa (v. 12). We learn that the angel told Cornelius that the message that Peter would bring would be words of salvation (v. 14). And Peter tells us here that the Spirit fell on them near the beginning of his talk (v. 15). So we will begin our exposition at verse 16.