'Signs' in the Bible

{And} if they also do not believe the second of these signs and they will not listen to your voice, [then] you must take water from the Nile and pour [it] onto the dry ground, and the water that you take from the Nile will become blood on the dry ground."

And you must take this staff in your hand, with which you will do the signs."

And Moses told Aaron all the words of Yahweh, who had sent him--and all the signs that he had commanded him.

And Aaron spoke all the words that Yahweh had spoken to Moses, and he did the signs before the eyes of the people.

And I myself will harden the heart of Pharaoh, and I will make my signs and my wonders numerous in the land of Egypt.

And Yahweh said to Moses, "Go to Pharaoh, for I have made his heart {insensitive} and the heart of his servants in order to put these signs of mine in his midst,

so that you will tell in the ears of your child and {your grandchild} that I dealt harshly with [the] Egyptians and [so that you will tell about] my signs that I have done among them, and so you will know that I [am] Yahweh."