Surah An-Nahl 16:124

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

The sabbath was only appointed for those who differed over it. And indeed, your Lord will judge between them on the Day of Resurrection concerning that over which they used to differ.

Translation: Saheeh International

Tafsir

The Sabbath was only prescribed in other words its consecration was made obligatory only for those who differed concerning it with their prophet — these were the Jews. They were commanded to devote themselves solely to worship on Friday but they said ‘We do not want it’ and chose Saturday; …

Excerpt from Tafsir al-Jalalayn, commentary on 16:124, via Quran.com. The reader has the full commentary and 9 more tafsirs.