Mark 13:7

When you hear of wars and rumors of wars, do not be alarmed; such things must happen, but the end is not yet.

Matthew 18:7

Woe to the world because of temptations to sin! For temptations must come, but woe to the man by whom the temptation comes!

Matthew 24:6-7

And you will hear of wars and rumors of wars. See that you are not alarmed; for all these things must come to pass, but the end is not yet.

Luke 21:9-11

And when you hear of wars and revolutions, do not be terrified; for these things must first take place, but the end will not come immediately."

John 14:1

"Let not your hearts be troubled; believe in God, believe also in me.

John 14:27

Peace I leave with you; my peace I give to you; not as the world gives do I give to you. Let not your hearts be troubled, neither let them be afraid.

Acts 17:3

explaining and proving that the Christ had to suffer and rise again from the dead, and saying, "This Jesus whom I am proclaiming to 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 hear of wars and rumors of wars. See that you are not alarmed; for all these things must come to pass, but the end is not yet.
Luke 21:9
And when you hear of wars and revolutions, do not be terrified; for these things must first take place, but the end will not come immediately."
John 14:1
"Let not your hearts be troubled; believe in God, believe also in me.

Must

Matthew 18:7
Woe to the world because of temptations to sin! For temptations must come, but woe to the man by whom the temptation comes!
Acts 17:3
explaining and proving that the Christ had to suffer and rise again from the dead, and saying, "This Jesus whom I am proclaiming to you is the Christ."