Stealing Hearts and Minds: Tales of Deception (Geneivat Da'at)

(13) You shall not murder. You shall not commit adultery. You shall not steal. You shall not bear false witness against your neighbor.

(1) 3. There are seven thieveries. First - one who misrepresents [geneivat daat] themselves to others, one who insincerely invites another to their home, one who plies another with gifts they know they will not accept, one who impresses their guest by opening a barrel of wine already sold to a vendor, one who has improper measures, one who lies regarding weights, one who adulterates their merchandise... How do we know misrepresentation is theft? Because it says 'So Absalom stole the hearts of the men of Israel' (II Samuel 15:6)

(1) Sometime afterward, Absalom provided himself with a chariot, horses, and fifty outrunners. (2) Absalom used to rise early and stand by the road to the city gates; and whenever a man had a case that was to come before the king for judgment, Absalom would call out to him, “What town are you from?” And when he answered, “Your servant is from such and such a tribe in Israel,” (3) Absalom would say to him, “It is clear that your claim is right and just, but there is no one assigned to you by the king to hear it.” (4) And Absalom went on, “If only I were appointed judge in the land and everyone with a legal dispute came before me, I would see that he got his rights.” (5) And if a man approached to bow to him, [Absalom] would extend his hand and take hold of him and kiss him. (6) Absalom did this to every Israelite who came to the king for judgment. Thus Absalom won away the hearts of the men of Israel. (7) After a period of forty years had gone by, Absalom said to the king, “Let me go to Hebron and fulfill a vow that I made to the LORD. (8) For your servant made a vow when I lived in Geshur of Aram: If the LORD ever brings me back to Jerusalem, I will worship the LORD.” (9) The king said to him, “Go in peace”; and so he set out for Hebron. (10) But Absalom sent agents to all the tribes of Israel to say, “When you hear the blast of the horn, announce that Absalom has become king in Hebron.” (11) Two hundred men of Jerusalem accompanied Absalom; they were invited and went in good faith, suspecting nothing.

...This is as Shmuel said: It is prohibited to deceive people, and even to deceive a gentile. ...

It is taught in a baraita that Rabbi Meir would say: ... And one may not open barrels of wine for a guest if they have already been sold to a storekeeper, unless he notifies the guest beforehand that the barrel had been sold. And he may not say to another: Anoint yourself with oil, and place an empty jug before him with the knowledge that he will not attempt to anoint himself. But if he does so for the guest’s honor, to show that he holds his guest in high esteem, rather than to deceive the guest so that he will feel indebted to him, it is permitted...

The Sages taught in a baraita: A person may not go to a house of mourning with a wine jug [lagin] in his hand that is mostly empty and where the small amount of wine rattles about, because the mourner will think that his visitor is bringing him a full jug of wine. And he may not fill up that jug of wine with water, because he thereby misleads the mourner into thinking he has brought him a full jug of undiluted wine. But if there is a crowd of people [ḥever ir] and the guest wants to honor the mourner in their presence, it is permitted.

(17) Thereupon Jacob put his children and wives on camels; (18) and he drove off all his livestock and all the wealth that he had amassed, the livestock in his possession that he had acquired in Paddan-aram, to go to his father Isaac in the land of Canaan. (19) Meanwhile Laban had gone to shear his sheep, and Rachel stole her father’s household idols. (20) Jacob kept Laban the Aramean in the dark, not telling him that he was fleeing, (21) and fled with all that he had. Soon he was across the Euphrates and heading toward the hill country of Gilead. (22) On the third day, Laban was told that Jacob had fled. (23) So he took his kinsmen with him and pursued him a distance of seven days, catching up with him in the hill country of Gilead. (24) But God appeared to Laban the Aramean in a dream by night and said to him, “Beware of attempting anything with Jacob, good or bad.” (25) Laban overtook Jacob. Jacob had pitched his tent on the Height, and Laban with his kinsmen encamped in the hill country of Gilead. (26) And Laban said to Jacob, “What did you mean by keeping me in the dark and carrying off my daughters like captives of the sword? (27) Why did you flee in secrecy and mislead me and not tell me? I would have sent you off with festive music, with timbrel and lyre. (28) You did not even let me kiss my sons and daughters good-by! It was a foolish thing for you to do. (29) I have it in my power to do you harm; but the God of your father said to me last night, ‘Beware of attempting anything with Jacob, good or bad.’ (30) Very well, you had to leave because you were longing for your father’s house; but why did you steal my gods?” (31) Jacob answered Laban, saying, “I was afraid because I thought you would take your daughters from me by force. (32) But anyone with whom you find your gods shall not remain alive! In the presence of our kinsmen, point out what I have of yours and take it.” Jacob, of course, did not know that Rachel had stolen them...