1. Revelation 11:5 (ESV)
  2. Exposition

Why does verse 5 twice mention the possibility that someone might harm these two witnesses?

Revelation 11:5 (ESV)

5 And if anyone would harm them, fire pours from their mouth and consumes their foes. If anyone would harm them, this is how he is doomed to be killed.

The double mention indicates the very real desire of the nations to trample them thoroughly underfoot. This speaks to the hatred that those who reject Jesus Christ have toward the Savior and therefore those who belong to him.