Why Abraham Called Sarah His Sister Twice and What It Really Meant

The story of Abraham calling Sarah his sister is the kind of Torah passage that embarrasses modern readers. A patriarch lets a foreign king take his wife into the palace because he is afraid of being killed for her. He lies, she lies, and God has to intervene to keep the situation from turning catastrophic. Most people read it as a moral failure. The oldest Jewish commentary on the passage says it was something else entirely. It was a plan the two of them had made together, years earlier, the night Abraham walked out of his father's house.

The detail is preserved in Targum Jonathan on Genesis 20, an Aramaic paraphrase of the Torah that was read aloud in synagogues from the late antique period forward. When Abraham is caught by Abimelech, king of Gerar, he does not simply stammer through an excuse. In the Hebrew of Genesis 20:13, he says Sarah is "the daughter of my father but not the daughter of my mother," a technicality that makes her his half-sister. The Targum changes the line. In Targum Jonathan, Abraham says she is "the daughter of my father's brother," his cousin. And then he adds a sentence that does not appear in the Hebrew at all.

"When they sought to turn me aside to the worship of idols, and I went forth from my father's house, I said to her, This is the kindness thou shalt do me: in every place to which we come, say concerning me, He is my brother."

That single added line changes everything.

Picture the scene the Targum is asking you to picture. Abraham is young. He has just refused the gods of Terah, his father. According to the traditions preserved in Pirkei DeRabbi Eliezer, the early medieval midrash compiled in eighth-century Palestine, Abraham had already smashed his father's idols and survived the furnace of Nimrod. He was a marked man. To leave Ur with Sarah was not a pastoral retirement. It was a flight. They were a two-person religious minority walking out of an empire, and Abraham knew that the places they were heading had the same idols and the same appetites as the city they were leaving. He also knew something the Torah only hints at. Sarah was beautiful. Dangerous-beautiful. Men-take-a-married-woman-and-kill-her-husband beautiful. The rabbis of Bereshit Rabbah, compiled in fifth-century Palestine, say her beauty was such that travelers would stop in the road and stare.

So they made a pact.

Say you are my sister. Everywhere. Every kingdom. Every road. If a king wants you, I would rather negotiate as a brother than be a corpse. The Targum is framing this as an act of partnership, not betrayal. Sarah was not deceived into the lie. She helped write it. When Abimelech's guards came for her in Gerar and she stepped into that palace, she stepped in with a script she and her husband had rehearsed in Ur decades earlier.

The other astonishing detail in Targum Jonathan on Genesis 20 is what God tells Abimelech that night. "Before Me also it is manifest that in the truthfulness of thy heart thou didst this, and so restrained I thee from sinning before Me; therefore I would not permit thee to come near her." In the Hebrew text, God simply notes Abimelech's innocence. In the Targum, God takes credit for the restraint. He says He physically prevented the king from touching Sarah. It was not circumstance. It was not bad timing. It was a divine hand on Abimelech's shoulder in the dark, holding him back from the bedroom door. The pact Abraham and Sarah had made was the cover story. God was the enforcement.

The pattern repeats in Legends of the Jews 5:143, compiled by Louis Ginzberg in 1909. When God later visits Abraham's tent and promises Sarah a son, Sarah laughs inside the tent. Abraham laughs too, though the Torah is kinder to him and does not record it. When God speaks to Abraham afterward, He mentions only Sarah's laugh. Ginzberg preserves the rabbinic reading. God edited the transcript. He did not want Abraham to know what Sarah had said about his age. The sages saw in that moment a principle so important that God Himself bent the truth for it. Shalom bayit. Peace in the house. The Talmud tractate Yevamot 65b, compiled in Babylonia by the sixth century CE, builds on this and rules that a person may speak a soft lie for the sake of peace between husband and wife. The source for the rule is God's own edit.

So the two moments bracket the entire story. At the beginning, Abraham and Sarah agree to a lie that will keep them alive among idolaters. At the end, God tells a lie to keep their marriage at peace. The sister deception stops looking like cowardice the moment you read it through the Targum's lens. It looks like two people who had already decided, together, that the story of how they survived did not belong to anyone but them.

Abimelech gave Abraham sheep and a thousand pieces of silver. He told Sarah the money was a veil for her eyes. The Targum closes the chapter with one careful note, the kind a midrash adds when it is trying to protect a reputation. Abraham knew, it says, that Abimelech had not come near Sarah his wife. He knew because they had planned for it. And because God had kept the hand on the door.