6 These have power to shut heaven, that it rain not in the days of their prophecy; and have power over the waters to turn them to blood, and to smite the earth with every plague, as often as they will.
Revelation 11:6 Cross References - ABU
Luke 4:25
25 But I tell you of a truth, there were many widows in Israel in the days of Elijah, when the heaven was shut up three years and six months, when there was a great famine throughout all the land;
James 5:16-18
16 Confess therefore your trespasses to one another, and pray for one another, that ye may be healed. The earnest prayer of a righteous man avails much.
17 Elijah was a man of like nature with us; and he prayed earnestly that it might not rain, and it rained not on the earth for three years and six months.
18 And again he prayed, and the heaven gave rain, and the earth brought forth her fruit.