Sura al-Naḥl 16:124

إِنَّمَا جُعِلَ ٱلسَّبْتُ عَلَى ٱلَّذِينَ ٱخْتَلَفُوا۟ فِيهِ وَإِنَّ رَبَّكَ لَيَحْكُمُ بَيْنَهُمْ يَوْمَ ٱلْقِيَٰمَةِ فِيمَا كَانُوا۟ فِيهِ يَخْتَلِفُونَ

innamā juʿila l-sabtu ʿalā lladhīna akhtalafū fīhi wa-inna rabbaka la-yaḥkumu baynahum yawma l-qiyāmati fī-mā kānū fīhi yakhtalifūna

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.