Revelation 11:4-5

These [witnesses] are the two olive trees and the two lampstands which stand before the Lord of the earth. [Zech 4:3, 11-14] And if anyone wants to harm them, fire comes out of their mouth and devours their enemies; so if anyone wants to harm them, he must be killed in this way. [2 Kin 1:10-12; Jer 5:14]