Four.

Acts 10:7-9, 23, 24
When the angel who spoke to him had gone, Cornelius called two of his servants and a devout soldier from among his personal attendants. . . .

I was.

Acts 10:3
One day at about the ninth hour, he had a clear vision of an angel of God who came to him and said, "Cornelius!"

Ezra 9:4, 5
Then everyone who trembled at the words of the God of Israel gathered around me because of the unfaithfulness of the exiles, while I sat there in horror until the evening offering. . . .

Nehemiah 9:1-3
On the twenty-fourth day of the same month, the Israelites gathered together, fasting and wearing sackcloth, with dust on their heads. . . .

Daniel 9:20, 21
While I was speaking, praying, confessing my sin and that of my people Israel, and presenting my petition before the LORD my God concerning His holy hill-- . . .

and, behold.

Acts 1:10
They were looking intently into the sky as He was going, when suddenly two men dressed in white stood beside them.

Matthew 28:3
His appearance was like lightning, and his clothing white as snow.

Mark 16:6
But he said to them, "Do not be alarmed. You are looking for Jesus the Nazarene, who was crucified. He has risen! He is not here! See the place where they laid Him.

Luke 24:4
While they were puzzling over this, suddenly two men in radiant apparel stood beside them.