Acts 12:23

Suddenly, an angel from God struck him [with a terrible condition] because he refused to honor God [by what he said in his speech], so he was consumed by worms and died.

1 Thessalonians 5:2-3

for you know perfectly well that the day of the Lord [i.e., when He returns, See II Thess. 2:1-2] will arrive like a thief coming in the night.

Treasury of Scripture Knowledge

Summary

Then the angel of the LORD went forth, and smote in the camp of the Assyrians a hundred and fourscore and five thousand: and when they arose early in the morning, behold, they were all dead corpses.

The angel

Bible References

The angel

Acts 12:23
Suddenly, an angel from God struck him [with a terrible condition] because he refused to honor God [by what he said in his speech], so he was consumed by worms and died.

And when

1 Thessalonians 5:2
for you know perfectly well that the day of the Lord [i.e., when He returns, See II Thess. 2:1-2] will arrive like a thief coming in the night.