Romans 1:2

God had promised this good news a long time ago through His prophets [and had it written] in the holy Scriptures [i.e., the Old Testament].

Romans 3:21

But now [i.e., under the Gospel age], a way of being considered right with God apart from [any] law has been made known. [The writings of] the law [i.e., the Pentateuch] and the prophets bear witness to this.

Titus 1:2

[and provides] hope for never ending life. God, who cannot lie, promised this [life] before the beginning of time,

Luke 1:70

(as He spoke through the message of the holy prophets of long ago).

Luke 24:26-27

Was it not necessary for the Christ [i.e., God's specially chosen one] to suffer these things, and [then] to enter His glorious state [with the Father]?"

Acts 10:43

All the prophets have testified [in their writings], that it is through the name of Jesus that every person who believes in Him will receive the forgiveness of sins."

Acts 26:6

And now I am standing [here], being judged because [I believe that] God will fulfill the hope He promised to our forefathers.

Romans 3:2

Much in every way! First of all, the Jews were entrusted with the messages of God [i.e., their prophets received divine revelations].

Romans 16:26

It is now being made known through the writings of the prophets, as commanded by the eternal God, to [people of] all the nations, in order to bring about their obedience to the faith

Treasury of Scripture Knowledge

Summary

(Which he had promised afore by his prophets in the holy scriptures,)

Bible References

Which

Luke 24:26
Was it not necessary for the Christ [i.e., God's specially chosen one] to suffer these things, and [then] to enter His glorious state [with the Father]?"
Acts 10:43
All the prophets have testified [in their writings], that it is through the name of Jesus that every person who believes in Him will receive the forgiveness of sins."
Acts 26:6
And now I am standing [here], being judged because [I believe that] God will fulfill the hope He promised to our forefathers.
Titus 1:2
[and provides] hope for never ending life. God, who cannot lie, promised this [life] before the beginning of time,

By

Romans 3:21
But now [i.e., under the Gospel age], a way of being considered right with God apart from [any] law has been made known. [The writings of] the law [i.e., the Pentateuch] and the prophets bear witness to this.