The Women - 4:47
People of the Book! Believe in what We have sent down confirming what is with you, before We turn away some faces and send them into exile and curse them as We cursed the people of Saturday. Allah´s command has always been practiced.
How were the people of Saturday cursed?
The Cow/2:65
"Surely you know those of you who transgressed the prohibition of Saturday. We said to them: "Be despicable monkeys"."