The Day of Judgement and the fleeing of the People from Their Relatives during it

Ibn `Abbas said, "As-Sakhkhah is one of the names of the Day of Judgement that Allah has magnified and warned His servants of." Ibn Jarir said, "Perhaps it is a name for the blowing into Trumpet." Al-Baghawi said, "As-Sakhkhah means the thunderous shout of the Day of Judgement. It has been called this because it will deafen the ears. This means that it pierces the hearing to such an extent that it almost deafens the ears."

يَوْمَ يَفِرُّ الْمَرْءُ مِنْ أَخِيهِ - وَأُمِّهِ وَأَبِيهِ - وَصَـحِبَتِهُ وَبَنِيهِ

فَإِذَا جَاءَتِ الصَّاخَّةُ ( So when there will come the Deafening Noise..80:33). The word sakhkhah means 'deafening cry or shout' and it refers to the blowing of the trumpet, which will be a deafening sound.