﴿ إِذًۭا لَّأَذَقْنَٰكَ ضِعْفَ ٱلْحَيَوٰةِ وَضِعْفَ ٱلْمَمَاتِ ثُمَّ لَا تَجِدُ لَكَ عَلَيْنَا نَصِيرًۭا ﴾

“in which case We would indeed have made thee taste double [chastisement] in life and double [chastisement] after death, and thou wouldst have found none to succour thee against Us!”

After that, it was said: إِذًا لَّأَذَقْنَاكَ ضِعْفَ الْحَيَاةِ وَضِعْفَ الْمَمَاتِ. It means: Supposing the impossible, if you would have come closer to tilting towards their wrong move, your punishment would have been double in life and double after death (in the grave or the Hereafter, because even an insignificant error made by those close to Allah is considered to be very grave). What has been said here is almost the same as was said about the blessed wives of the Holy Prophet ﷺ in Surah al-Ahzab: يَا نِسَاءَ النَّبِيِّ مَن يَأْتِ مِنكُنَّ بِفَاحِشَةٍ مُّبَيِّنَةٍ يُضَاعَفْ لَهَا الْعَذَابُ ضِعْفَيْنِ (0 wives of the Prophet, whoever of you should commit a clear act of immodesty, the punishment for her will be multiplied doubly - 33:30).