OT-LAW.filter - bes rivers:

bes@Exodus:7:19 @ And the Lord said to Moses, Say to thy brother Aaron, Take thy rod in thy hand, and stretch forth thy hand over the waters of Egypt, and over their rivers, and over their canals, and over their ponds, and over all their standing water, and it shall become blood: and there was blood in all the land of Egypt, both in vessels of wood and of stone.

bes@Exodus:8:5 @ And the Lord said to Moses, Say to Aaron thy brother, Stretch forth with the hand thy rod over the rivers, and over the canals, and over the pools, and bring up the frogs.