Exodus 4:9
And if they do not believe even these two signs or listen to you, then take some water from the Nile and pour it out on the dry ground. The water you take out of the Nile will become blood on the dry ground."
Exodus 1:22
Then Pharaoh commanded all his people, "All sons that are born you must throw into the river, but all daughters you may let live."
Exodus 7:19-25
Then the Lord said to Moses, "Tell Aaron, 'Take your staff and stretch out your hand over Egypt's waters -- over their rivers, over their canals, over their ponds, and over all their reservoirs -- so that it becomes blood.' There will be blood everywhere in the land of Egypt, even in wooden and stone containers."
Matthew 7:2
For by the standard you judge you will be judged, and the measure you use will be the measure you receive.