The Prescription of the Sabbath for the Jews

There is no doubt that for every nation, Allah prescribed one day of the week for people to gather to worship Him. For this Ummah He prescribed Friday, because it is the sixth day, on which Allah completed and perfected His creation. On this day He gathered and completed His blessings for His servants. It was said that Allah prescribed this day for the Children of Israel through His Prophet Musa, but they changed it and chose Saturday because it was the day on which the Creator did not create anything, as He had completed His creation on Friday. Allah made observance of the Sabbath obligatory for them in the laws of the Tawrah (Torah), telling them to keep the Sabbath. At the same time, He told them to follow Muhammad ﷺ when he was sent, and took their promises and covenant to that effect. Hence Allah says:

إِنَّمَا جُعِلَ السَّبْتُ عَلَى الَّذِينَ اخْتَلَفُواْ فِيهِ

The Holy Prophet being on the way of Sayyidna Ibrahim (علیہ السلام) : Understanding the Chemistry of Adherence

When Sayyidna Ibrahim I appeared, Allah Ta’ ala blessed him with a Shari'ah and its Injunctions. When the Last of the Prophets ﷺ appeared, his Shari'ah too - with the exception of some particular Injunctions - was laid out in accordance with it. Though, the Holy Prophet ﷺ is preferred as more distinguished (afdal) of all blessed prophets and messengers, but at this place, there are two wise considerations in asking the preferred (afdal) to follow the one not so preferred (mafdul) in the present context. (1) Since that Shari'ah has come into the world earlier and is already known and recognized and as the last Shari'ah was also to be in accord with that, therefore, this similarity of the Holy Prophet ﷺ to the way of Sayyidna Ibrahim (علیہ السلام) was expressed through the word: اِتِّبَاع (ittiba': following). (2) As said by ` Allamah al-Zamakhshari (author of Tafsir Al-Kashshaf), this command to follow too is a special tribute out of the many honours and tributes attributed to the 'friend' of Allah, Sayyidna Ibrahim (علیہ السلام) . That it is so special has been hinted through the use of the word: ثُمَّ (thumma: Then - 123). The sense being conveyed is: Certainly great are all those merits and perfections of the person of Sayyidna Ibrahim (علیہ السلام) as they are, but the most superior of all these is the fact that Allah Ta’ ala has asked his preferred-most and the dearest rasul to follow his way.