Surah Al-Nahl (The Bees), Verse 124

اِنَّمَا جُعِلَ السَّبْتُ عَلَی الَّذِیْنَ اخْتَلَفُوْا فِیْهِ وَاِنَّ رَبَّكَ لَیَحْكُمُ بَیْنَهُمْ یَوْمَ الْقِیٰمَةِ فِیْمَا كَانُوْا فِیْهِ یَخْتَلِفُوْنَ ۟

Innnamaa ju'ilas Sabtu 'alal lazeenakhtalafoo feeh; wa inna Rabbaka la yahkumu bainahum Yawmal Qiyaamati feemaa kaanoo feehi yakhtalifoon

“The Sabbath was only made (strict) for those who disagreed (as to its observance); But Allah will judge between them on the Day of Judgment, as to their differences.”

Quran 16:124 (Yusuf Ali Translation)