Revelation 10:7

But in the days of the voice of the seventh angel, when he shall sound, the mystery of God shall be fulfilled, as he hath declared to his servants the prophets.

Romans 16:25

according to my gospel and the preaching of Jesus Christ, (according to the revelation of the mystery kept secret since the world began,

Luke 24:44-47

And he said to them, These are the words which I spake to you, being yet with you, that all things written in the law of Moses, and the prophets, and the psalms concerning me, must be fulfilled.

Acts 3:21

who was before appointed, Whom heaven must receive, till the times of the restitution of all things, which God hath spoken by the mouth of his holy prophets.

Romans 11:25

Brethren, I would not that ye should be ignorant of this mystery, (lest ye should be wise in your own conceits) that hardness is in part happened to Israel, till the fulness of the Gentiles be come in:

Ephesians 3:3-9

as I wrote before in few words,

Revelation 11:15-18

And the seventh angel sounded, and there were great voices in heaven, saying, The kingdom of the world is become the kingdom of our Lord and of his Christ, and he shall reign for ever and ever.

Treasury of Scripture Knowledge

Summary

But in the days of the voice of the seventh angel, when he shall begin to sound, the mystery of God should be finished, as he hath declared to his servants the prophets.

Bible References

In the

Revelation 11:15
And the seventh angel sounded, and there were great voices in heaven, saying, The kingdom of the world is become the kingdom of our Lord and of his Christ, and he shall reign for ever and ever.

The mystery

Romans 11:25
Brethren, I would not that ye should be ignorant of this mystery, (lest ye should be wise in your own conceits) that hardness is in part happened to Israel, till the fulness of the Gentiles be come in:
Romans 16:25
according to my gospel and the preaching of Jesus Christ, (according to the revelation of the mystery kept secret since the world began,
Ephesians 3:3
as I wrote before in few words,

As he

Luke 24:44
And he said to them, These are the words which I spake to you, being yet with you, that all things written in the law of Moses, and the prophets, and the psalms concerning me, must be fulfilled.
Acts 3:21
who was before appointed, Whom heaven must receive, till the times of the restitution of all things, which God hath spoken by the mouth of his holy prophets.