This what will happen when the Prophet (saws) will witness against the nations. This verse is a complementary of the following verse:

 وَكَذَٰلِكَ جَعَلْنَاكُمْ أُمَّةً وَسَطًا لِّتَكُونُوا شُهَدَاءَ عَلَى النَّاسِ وَيَكُونَ الرَّسُولُ عَلَيْكُمْ شَهِيدًا

(And thus we have made you a just community that you will be witnesses over the people and the Messenger will be a witness over you.) (Al-Baqara: 143)

Meaning, Allah (swt) will call all the Messengers and the Prophets to witness over all the nations in the Last day, and the Prophet (saws) will be the witness over all the Prophets and the nations, at that time, the disbelievers and those who disobeyed, fought, rejected, and harmed him the Prophet (saws) will wish that they were buried in the earth, but they will never be able to hide a single fact, because Allah (swt) is the Witness of all the deeds and the secrets.

The followed verses talk about the sequence rulings of the wine: