Matthew 17:11

He answered, "Elijah does come and is to reform everything,

Luke 1:16-17

and he will turn many of Israel's descendants to the Lord their God.

Acts 3:21

Yet he must remain in heaven till the time for the universal reformation of which God told in ancient times by the lips of his holy prophets.

Luke 3:3-14

And he went all through the Jordan Valley preaching repentance and baptism in order to obtain the forgiveness of sins,

Treasury of Scripture Knowledge

Summary

And Jesus answered and said unto them, Elias truly shall first come, and restore all things.

General references

Bible References

And restore

Luke 1:16
and he will turn many of Israel's descendants to the Lord their God.
Luke 3:3
And he went all through the Jordan Valley preaching repentance and baptism in order to obtain the forgiveness of sins,
Acts 3:21
Yet he must remain in heaven till the time for the universal reformation of which God told in ancient times by the lips of his holy prophets.

General references

Mark 9:11
And they asked him, "Why do the scribes say that Elijah has to come first?"