Sabbath in the Qur'an
Sura 2:65 And well ye knew those amongst you who transgressed in the matter of
the Sabbath; We said to them: "Be ye apes despised and rejected."
Sura 4:154 And for their Covenant We raised over them (the towering height) of Mount (Sinai); and (on another occasion) We said: "Enter the gate with humility"; and (once again) We commanded them: "Transgress not in the matter of the Sabbath." And We took from them a solemn Covenant.
Sura 4:47 O ye people of the Book! believe in what We have (now) revealed confirming what was (already) with you before We change the face and fame of some (of you) beyond all recognition and turn them hindwards or curse them as We cursed the Sabbath-breakers: for the decision of Allah must be carried out.
Sura 7: 163 Ask them concerning the town standing close by the sea. Behold! they transgressed in the matter of the Sabbath. For on the day of their Sabbath their fish did come to them openly holding up their heads but on the day they had no Sabbath they came not: thus did We make a trial of them for they were given to transgression.