Question:I have started reading my Bible consistently, and have a couple questions: Why do people say that the serpent who tempted Eve was Satan? I don't see that anywhere. Maybe I missed something? Also, someone once told me that Abram and Sarai were half siblings, but I can't seem to find that anywhere either. What do you think?
There are several passages that identify Satan being the serpent:
"So the great dragon was cast out, that serpent of old, called the Devil and Satan, who deceives the whole world; he was cast to the earth, and his angels were cast out with him" (Revelation 12:9).
"He laid hold of the dragon, that serpent of old, who is the Devil and Satan, and bound him for a thousand years" (Revelation 20:2).
"You are of your father the devil, and the desires of your father you want to do. He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he speaks a lie, he speaks from his own resources, for he is a liar and the father of it" (John 8:44).
In regards to Abraham and Sarah: "But indeed she is truly my sister. She is the daughter of my father, but not the daughter of my mother; and she became my wife" (Genesis 20:12).