Revelation 11:6
They have authority to shut the sky, so that no rain may fall during the days of their prophesying, and they have authority over the waters to turn them into blood, and to strike the earth with any plague as often as they wish — the witnesses' power is comprehensive: Elijah-like authority over rain (1 Kings 17:1), Moses-like power over waters (Exodus 7:17-21), and plague authority (Exodus 7-11). These powers establish them as the eschatological return of Elijah and Moses, the law and prophets.