Acts 15:23

and they took with them the following letter: "The Apostles and the elder brethren send greeting to the Gentile brethren throughout Antioch, Syria and Cilicia.

2 Corinthians 7:8

For if I gave you pain by that letter, I do not regret it, though I did regret it then. I see that that letter, even though for a time it gave you pain, had a salutary effect.

Galatians 6:11

See in what large letters I am writing to you with my own hand.

Hebrews 13:22

Bear with me, brethren, when I thus exhort you; for, in fact, it is but a short letter that I have written to you.

Revelation 2:1-3

"To the minister of the Church in Ephesus write as follows: "'This is what He who holds the seven stars in the grasp of His right hand says--He who walks to and fro among the seven lampstands of gold.

Treasury of Scripture Knowledge

Summary

Now these are the words of the letter that Jeremiah the prophet sent from Jerusalem unto the residue of the elders which were carried away captives, and to the priests, and to the prophets, and to all the people whom Nebuchadnezzar had carried away captive from Jerusalem to Babylon;

Bible References

Of the letter

Acts 15:23
and they took with them the following letter: "The Apostles and the elder brethren send greeting to the Gentile brethren throughout Antioch, Syria and Cilicia.
2 Corinthians 7:8
For if I gave you pain by that letter, I do not regret it, though I did regret it then. I see that that letter, even though for a time it gave you pain, had a salutary effect.
Galatians 6:11
See in what large letters I am writing to you with my own hand.
Hebrews 13:22
Bear with me, brethren, when I thus exhort you; for, in fact, it is but a short letter that I have written to you.