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
Then the seventh angel sounded its trumpet, and there were loud voices in heaven saying, "The kingdom of the world has become the kingdom of our Lord [i.e., God] and of His Christ, and He will rule forever and ever."

The mystery

Romans 11:25
For I want you to know this secret, brothers, so you will not become conceited: Part of the Israelites have become [spiritually] insensitive [to God], [and will remain that way] until the fullness of the Gentiles occurs. [Note: As with verse 12, concerning the Jews, "fullness" here may mean either a large or the complete number of Gentiles who will be saved].
Romans 16:25
Now may there be glory for ever, through Jesus Christ, to the only wise God, who is able to make you stand firm [in the faith], according to the good news and proclamation of Jesus Christ. This message is the secret which was [eventually] revealed, after having been kept quiet about for long ages.
Ephesians 3:3
[It is] that God's secret plan [i.e., revealed in the Gospel preached to Gentiles. See verse 6] was made known to me by way of a revelation. [See Acts 9:15; 22:21]. I have already written to you [about this] briefly [i.e., probably a reference to 1:9ff].

As he

Luke 24:44
Then Jesus said to the apostles, "These are the words that I told you while I was still with you, [when I said] that everything written in the law of Moses, and the prophets, and the psalms about me needed to be fulfilled."
Acts 3:21
who must be received into heaven until [God's appointed] times when everything will be restored [to its intended purpose]. God had spoken about this through the proclamations of His holy prophets of long ago.