Revelation 11:6

These witnesses have the authority to shut the sky up so that it does not rain during the time they are prophesying. And they have the authority to turn the waters into blood, and to strike the earth with every kind of plague whenever they want to.

Luke 4:25

But it is true when I tell you, [while] there were many widows [living] in Israel during the time of Elijah, when it did not rain for three and a half years, causing a great famine over the entire land,

James 5:16-18

So, confess your sins to one another, and pray for one another to be healed [from sin sickness]. The special request of a righteous person is empowered with [great] effectiveness.

Treasury of Scripture Knowledge

Summary

These have power to shut heaven, that it rain not in the days of their prophecy: and have power over waters to turn them to blood, and to smite the earth with all plagues, as often as they will.

Bible References

Power

Luke 4:25
But it is true when I tell you, [while] there were many widows [living] in Israel during the time of Elijah, when it did not rain for three and a half years, causing a great famine over the entire land,
James 5:16
So, confess your sins to one another, and pray for one another to be healed [from sin sickness]. The special request of a righteous person is empowered with [great] effectiveness.