Rambam, Laws of Theft 5:1
1 א
רמבם, הלכות גניבה ה:א
2ב
אסור לקנות מן הגנב החפץ שגנב ועון גדול הוא שהרי מחזיק ידי עוברי עבירה וגורם לו לגנוב גניבות אחרות, שאם לא ימצא לוקח אינו גונב, וע"ז נאמר (משלי כ"ט כ"ד) חולק עם גנב שונא נפשו.
One may not buy from a thief the goods he has stolen, and to do so is a great transgression because it strengthens the hands of those who violate the law and causes the thief to continue to steal, for if the thief would find no buyer he would not steal, as it says, “He who shares with a thief is his own enemy.” (Proverbs 2:24) [AJWS translation]
3 ג

Suggested Discussion Questions:

1. What counts as a stolen good?

2. What counts as strengthening the hand of the thief? How might we be doing this unwittingly?

4 ד
Time Period: Medieval (Geonim through the 16th Century)