'River' in the Bible

A river of fire was flowing,coming out from His presence.Thousands upon thousands served Him;ten thousand times ten thousand stood before Him.The court was convened,and the books were opened.

On the twenty-fourth day of the first month, as I was standing on the bank of the great river, the Tigris,

Then I, Daniel, looked, and two others were standing there, one on this bank of the river and one on the other.

One of them said to the man dressed in linen, who was above the waters of the river, “How long until the end of these extraordinary things?”

Then I heard the man dressed in linen, who was above the waters of the river. He raised both his hands toward heaven and swore by Him who lives eternally that it would be for a time, times, and half a time. When the power of the holy people is shattered, all these things will be completed.