The sounding of the Trumpet and the weighing of Deeds in the Scales
Allah says;
فَإِذَا نُفِخَ فِي الصُّورِ
Then, when the Trumpet is blown,
Allah says that when the Trumpet is blown for the Resurrection, and the people rise from their graves,
فَلَ أَنسَابَ بَيْنَهُمْ يَوْمَيِذٍ وَلَا يَتَسَاءلُون
there will be no kinship among them that Day, nor will they ask of one another.
meaning that lineage will be of no avail on that Day, and a father will not ask about his son or care about him.
Allah says;
وَلَا يَسْـَلُ حَمِيمٌ حَمِيماً يُبَصَّرُونَهُمْ
And no friend will ask a friend (about his condition), though they shall be made to see one another. (70;10-11)
meaning, no relative will ask about another relative, even if he can see him and even if he is carrying a heavy burden. Even if he was the dearest of people to him in this world, he will not care about him or take even the slightest part of his burden from him.
Allah says;
يَوْمَ يَفِرُّ الْمَرْءُ مِنْ أَخِيهِ
وَأُمِّهِ وَأَبِيهِ
وَصَـحِبَتِهُ وَبَنِيهِ
That Day shall a man flee from his brother. And from his mother and his father. And from his wife and his children. (80;34-36)
Ibn Mas`ud said,
"On the Day of Resurrection, Allah will gather the first and the last, then a voice will call out, `Whoever is owed something by another, let him come forth and take it.' And a man will rejoice if he is owed something or had been mistreated by his father or child or wife, even if it is little."
This is confirmed in the Book of Allah, where Allah says;
فَإِذَا نُفِخَ فِي الصُّورِ فَلَإ أَنسَابَ بَيْنَهُمْ يَوْمَيِذٍ وَلَاإ يَتَسَاءلُون
Then, when the Trumpet is blown, there will be no kinship among them that Day, nor will they ask of one another.
This was recorded by Ibn Abi Hatim.
فَمَن ثَقُلَتْ مَوَازِينُهُ فَأُوْلَيِكَ هُمُ الْمُفْلِحُونَ