Revelation 11:4-6

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] These [two witnesses] have the power [from God] to shut up the sky, so that no rain will fall during the days of their prophesying [regarding judgment and salvation]; and they have power over the waters (seas, rivers) to turn them into blood, and to strike the earth with every [kind of] plague, as often as they wish. [Ex 7:14-19; 1 Kin 17:1]