1 Peter 1:20

Destined for this before the beginning of the world, he has been revealed in these last days for your sakes,

Ephesians 1:4

For he chose us in our union with Christ before the creation of the universe, that we might be holy and blameless in his sight, living in the spirit of love.

Colossians 1:26

That Truth which has been hidden from former ages and generations. But now it has been revealed to God's People,

Hebrews 9:26

for then Christ would have had to undergo death many times since the creation of the world. But now, once and for all, at the close of the age, he has appeared, in order to abolish sin by the sacrifice of himself.

2 Timothy 1:9-10

It was God who saved us, and from him we received our solemn Call--not as a reward for anything that we had done, but in fulfillment of his own loving purpose. For that love was extended to us, through Christ Jesus, before time began,

Titus 1:2-3

and is based on the hope of Immortal Life, which God, who never lies, promised before the ages began,

Hebrews 1:2

has in these latter days spoken to us by the Son, whom he appointed the heir of all things, and through whom he made the universe.

Revelation 13:8

All who are living on earth will worship it--all whose names have not been written in the Lamb's Book of Life, the Lamb that has been sacrificed from the foundation of the world.

Acts 3:25-26

You yourselves are the heirs of the Prophets, and heirs, too, of the Covenant which God made with your ancestors, when he said to Abraham--'In your descendants will all the nations of the earth be blessed.'

Romans 3:25

For God set him before the world, to be, by the shedding of his blood, a means of reconciliation through faith. And this God did to prove his righteousness, and because, in his forbearance, he had passed over the sins that men had previously committed;

Romans 16:25-26

Now to him who is able to strengthen you, as promised in the Good News entrusted to me and in the proclamation of Jesus Christ, in accordance with the revelation of that hidden purpose, which in past ages was kept secret but now has been revealed

Galatians 4:4

But, when the full time came, God sent his Son--born a woman's child, born subject to Law--

Ephesians 1:10

In view of that Divine Order which was to mark the completion of the ages, when he should make everything, both in Heaven and on earth, center in him.

Ephesians 3:9

And to make clear what is God's way of working out that hidden purpose which from the first has been concealed in the mind of the Creator of all things;

Ephesians 3:11

In accordance with that purpose which runs through all the ages and which he has now accomplished in Jesus, the Christ, our Master.

1 John 1:2

That Life was made visible, and we have seen it, and now bear our testimony to it, and tell you of that Immortal Life, which was with the Father and was made visible to us.

1 John 3:5

And you know that Christ appeared to take away our sins; and in him Sin has no place.

1 John 3:8

He who lives sinfully belongs to the Devil, for the Devil has sinned from the first. It was for this that the Son of God appeared, that he might undo the Devil's work.

1 John 4:9-10

The love of God was revealed to us by his sending his only Son into the world, that we might find Life through him.

Treasury of Scripture Knowledge

Summary

Who verily was foreordained before the foundation of the world, but was manifest in these last times for you,

General references

Bible References

But

Acts 3:25
You yourselves are the heirs of the Prophets, and heirs, too, of the Covenant which God made with your ancestors, when he said to Abraham--'In your descendants will all the nations of the earth be blessed.'
Colossians 1:26
That Truth which has been hidden from former ages and generations. But now it has been revealed to God's People,
1 John 1:2
That Life was made visible, and we have seen it, and now bear our testimony to it, and tell you of that Immortal Life, which was with the Father and was made visible to us.
1 John 3:5
And you know that Christ appeared to take away our sins; and in him Sin has no place.
1 John 4:9
The love of God was revealed to us by his sending his only Son into the world, that we might find Life through him.

In

Galatians 4:4
But, when the full time came, God sent his Son--born a woman's child, born subject to Law--
Ephesians 1:10
In view of that Divine Order which was to mark the completion of the ages, when he should make everything, both in Heaven and on earth, center in him.
Hebrews 1:2
has in these latter days spoken to us by the Son, whom he appointed the heir of all things, and through whom he made the universe.
Hebrews 9:26
for then Christ would have had to undergo death many times since the creation of the world. But now, once and for all, at the close of the age, he has appeared, in order to abolish sin by the sacrifice of himself.

General references

Acts 15:18
Says the Lord, as he does these things, foreknown from of old.'