Revelation 4:1

After these things I looked, and behold, a door was opened in Heaven. And the first voice which I heard was as it were of a trumpet talking with me, saying, Come up here, and I will show you what must occur after these things.

Revelation 1:10

I came to be in the Spirit in the Lord's day and heard behind me a great voice, as of a trumpet,

Revelation 1:19

Write the things which you have seen, and the things which are, and the things which shall be after this,

Revelation 11:12

And they heard a great voice from Heaven saying to them, Come up here. And they went up to Heaven in a cloud, and their enemies watched them.

Revelation 22:6

And he said to me, These sayings are faithful and true. And the Lord God of the holy prophets sent His angel to show to His servants the things which must shortly be done.

Matthew 3:16

And Jesus, when He had been baptized, went up immediately out of the water. And lo, the heavens were opened to Him, and He saw the Spirit of God descending like a dove and lighting upon Him.

Mark 1:10

And immediately coming up out of the water, He saw the heavens opened, and the Spirit like a dove descending upon Him.

Luke 3:21

And it happened in the baptizing of all the people, Jesus also being baptized, and praying, and the heaven was opened.

Acts 7:56

And he said, Behold, I see Heaven opened and the Son of Man standing on the right hand of God.

Acts 10:11

And he saw the heaven opened and a certain vessel like a sheet coming down to him, being bound at the four corners and let down to the earth;

Revelation 16:17

And the seventh angel poured out his vial into the air. And a great voice came out of the temple of Heaven, from the throne, saying, It is done!

Exodus 1:1

And these were the names of the sons of Israel who came into Egypt. Every man and his household came with Jacob:

Exodus 19:24

And Jehovah said to him, Away! You go down, and you shall come up, you and Aaron with you. But do not let the priests and the people break through to come up to Jehovah, lest He break forth upon them.

Exodus 24:12

And Jehovah said to Moses, Come up to Me in the mountain, and be there. And I will give you tablets of stone, and the Law, and commandments which I have written, so that you may teach them.

Exodus 34:2-3

And be ready in the morning, and come up in the morning to Mount Sinai, and present yourself there to Me in the top of the mountain.

John 16:13

However, when He, the Spirit of Truth, has come, He will guide you into all truth. For He shall not speak of Himself, but whatever He hears, He shall speak. And He will announce to you things to come.

Revelation 1:1-3

A Revelation of Jesus Christ, which God gave to Him to declare to His servants things which must shortly come to pass. And He signified it by sending His angel to His servant John,

Treasury of Scripture Knowledge

Summary

After this I looked, and, behold, a door was opened in heaven: and the first voice which I heard was as it were of a trumpet talking with me; which said, Come up hither, and I will shew thee things which must be hereafter.

Bible References

A door

Exodus 1:1
And these were the names of the sons of Israel who came into Egypt. Every man and his household came with Jacob:
Matthew 3:16
And Jesus, when He had been baptized, went up immediately out of the water. And lo, the heavens were opened to Him, and He saw the Spirit of God descending like a dove and lighting upon Him.
Mark 1:10
And immediately coming up out of the water, He saw the heavens opened, and the Spirit like a dove descending upon Him.
Luke 3:21
And it happened in the baptizing of all the people, Jesus also being baptized, and praying, and the heaven was opened.
Acts 7:56
And he said, Behold, I see Heaven opened and the Son of Man standing on the right hand of God.
Acts 10:11
And he saw the heaven opened and a certain vessel like a sheet coming down to him, being bound at the four corners and let down to the earth;

The first

Revelation 1:10
I came to be in the Spirit in the Lord's day and heard behind me a great voice, as of a trumpet,
Revelation 16:17
And the seventh angel poured out his vial into the air. And a great voice came out of the temple of Heaven, from the throne, saying, It is done!

And i

Revelation 1:19
Write the things which you have seen, and the things which are, and the things which shall be after this,
Revelation 22:6
And he said to me, These sayings are faithful and true. And the Lord God of the holy prophets sent His angel to show to His servants the things which must shortly be done.
John 16:13
However, when He, the Spirit of Truth, has come, He will guide you into all truth. For He shall not speak of Himself, but whatever He hears, He shall speak. And He will announce to you things to come.