'Acts' in the Bible

I appeared to Abraham, to Isaac, and to Jacob (Israel) as God Almighty [El Shaddai], but by My name, Lord, I did not make Myself known to them [in acts and great miracles].

Therefore, say to the children of Israel, ‘I am the Lord, and I will bring you out from under the burdens of the Egyptians, and I will free you from their bondage. I will redeem and rescue you with an outstretched (vigorous, powerful) arm and with great acts of judgment [against Egypt].

But Pharaoh will not listen to you, and I shall lay My hand on Egypt and bring out My hosts [like a defensive army, tribe by tribe], My people the children of Israel, out of the land of Egypt by great acts of judgment (the plagues).