Mark 13:7

But when you hear of wars and rumors of war, you must not be alarmed. They have to come, but it is not yet the end.

Matthew 18:7

Alas for the world for such hindrances! They have to come, but alas for the man who causes them!

Matthew 24:6-7

You will hear of wars and rumors of war; do not let yourselves be alarmed. They have to come, but that is not the end.

Luke 21:9-11

But when you hear of wars and outbreaks, do not be alarmed. These have to come first, but the end does not follow immediately."

John 14:1

"Your minds must not be troubled; you must believe in God, and believe in me.

John 14:27

I leave you a blessing; I give you my own blessing. I do not give it to you as the world gives. Your minds must not be troubled or afraid.

Acts 17:3

explaining them and showing that the Christ had to suffer and rise from the dead. "Jesus," he said, "of whom I am telling 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
You will hear of wars and rumors of war; do not let yourselves be alarmed. They have to come, but that is not the end.
Luke 21:9
But when you hear of wars and outbreaks, do not be alarmed. These have to come first, but the end does not follow immediately."
John 14:1
"Your minds must not be troubled; you must believe in God, and believe in me.

Must

Matthew 18:7
Alas for the world for such hindrances! They have to come, but alas for the man who causes them!
Acts 17:3
explaining them and showing that the Christ had to suffer and rise from the dead. "Jesus," he said, "of whom I am telling you, is the Christ!"