As long as a person lives in this world his parents, siblings, spouse, friends and relatives etc., are with him; they are always with him in every trouble and hard times and try to relieve his sorrow and stress. If he is ill, they inquire after his health, but when the same person is buried in the narrow and dark grave, neither his parents, nor his siblings, nor family members and friends and relatives are with him, but rather he is alone in the grave. So the deceased person knows better whatever happens to him after he is buried in the grave.
It is stated in Ayah 10 of Surah Al-Hashr, part 28:
وَ ا لَّذِیۡنَ جَآ ءُ وۡ مِنۡۢ بَعۡدِ ہِمۡ یَقُوۡ لُوۡنَ رَبَّنَا اغۡفِرۡ لَنَا وَ لِاِ خۡوَا نِنَا الَّذِیۡنَ سَبَقُوۡنَا بِالۡاِیۡمَانِ
Translation from Kanz-ul-Iman: And those who came after them make the plea: O our Lord! Forgive us and our brothers who preceded us in faith.
Talking about the reality of the grave in a blessed Hadees, the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم has said, اَلْقَبْرُ رَوْضَةٌ مِنْ رِيَاضِ الْجَنَّةِ، اَوْ حُفْرَةٌ مِنْ حُفَرِ النَّار Undoubtedly the grave is either a garden from the gardens of Paradise or a ditch from the ditches of Hell.
