Luke 4:43

He answered them, "I must preach the glad news of the Reign of God to the other towns as well, for that is what I was sent to do."

Mark 1:14-15

After John had been arrested, Jesus went to Galilee preaching the gospel of God;

Mark 1:38-39

but he said to them, "Let us go somewhere else, to the adjoining country-towns, so that I may preach there as well; that is why I came out here."

John 6:38-40

for I have come down from heaven not to carry out my own will but the will of him who sent me,

John 9:4

While daylight lasts, we must be busy with the work of God: night comes, when no one can do any work.

John 20:21

Jesus then repeated, "Peace be with you! As the Father sent me forth, I am sending you forth."

2 Timothy 4:2

I adjure you to preach the word; keep at it in season and out of season, refuting, checking, and exhorting men; never lose patience with them, and never give up your teaching,

Treasury of Scripture Knowledge

Summary

And he said unto them, I must preach the kingdom of God to other cities also: for therefore am I sent.

Therefore

General references

Bible References

I must

Mark 1:14
After John had been arrested, Jesus went to Galilee preaching the gospel of God;
John 9:4
While daylight lasts, we must be busy with the work of God: night comes, when no one can do any work.
2 Timothy 4:2
I adjure you to preach the word; keep at it in season and out of season, refuting, checking, and exhorting men; never lose patience with them, and never give up your teaching,

Therefore

John 6:38
for I have come down from heaven not to carry out my own will but the will of him who sent me,
John 20:21
Jesus then repeated, "Peace be with you! As the Father sent me forth, I am sending you forth."

General references

Matthew 9:35
Then Jesus made a tour through all the towns and villages, teaching in their synagogues, preaching the gospel of the Reign, and healing every disease and complaint.