Mark 13:7

And when you may hear of wars and rumors of wars, be not disturbed: for it behooves it to be so; but the end is not yet.

Matthew 18:7

Woe unto the world on account of offensives, for it is necessary that offensives come; but woe unto that man through whom the offense comes!

Matthew 24:6-7

And you will be about to hear of wars and rumors of wars: see that you are not disturbed: for it behooveth all these things to be, but the end is not yet.

Luke 21:9-11

And when ye may hear of wars and commotions, be not affrighted: for it behooveth these things first to take place; but the end is not immediately.

John 14:1

Let not your heart be troubled: ye believe in God, believe also in me.

John 14:27

My peace I leave with you; my peace I give unto you: not as the world gives, give I unto you. Let not your heart be troubled, nor afraid.

Acts 17:3

opening and proving, that it behooved Christ to suffer, and to rise from the dead, and that this Jesus, whom I preach unto you, is the Christ.

Treasury of Scripture Knowledge

Summary

And when ye shall hear of wars and rumours of wars, be ye not troubled: for such things must needs be; but the end shall not be yet.

Bible References

When

Matthew 24:6
And you will be about to hear of wars and rumors of wars: see that you are not disturbed: for it behooveth all these things to be, but the end is not yet.
Luke 21:9
And when ye may hear of wars and commotions, be not affrighted: for it behooveth these things first to take place; but the end is not immediately.
John 14:1
Let not your heart be troubled: ye believe in God, believe also in me.

Must

Matthew 18:7
Woe unto the world on account of offensives, for it is necessary that offensives come; but woe unto that man through whom the offense comes!
Acts 17:3
opening and proving, that it behooved Christ to suffer, and to rise from the dead, and that this Jesus, whom I preach unto you, is the Christ.