Al-Kāfi

Hadith 894
death
9ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ عَلِيِّ بْنِ حَدِيدٍ عَنْ جَمِيلٍ عَنْ عَمْرِو بْنِ الأشْعَثِ أَنَّهُ سَمِعَ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلام) يَقُولُ يُسْأَلُ الرَّجُلُ فِي قَبْرِهِ فَإِذَا أَثْبَتَ فُسِحَ لَهُ فِي قَبْرِهِ سَبْعَةَ أَذْرُعٍ وَفُتِحَ لَهُ بَابٌ إِلَى الْجَنَّةِ وَقِيلَ لَهُ نَمْ نَوْمَةَ الْعَرُوسِ قَرِيرَ الْعَيْنِ.
9. Muhammad ibn Yahya from Ahmad ibn Muhammad ibn ‘Isa from Ali ibn Hadid from Jamil from ‘Amr ibn al-Ash‘ath who has said the following: “I heard abu ‘Abd Allah (a.s.), say that a man is interrogated in his grave. If he remains steadfast (in his belief), his grave is then made spacious by nine yards, a door to paradise is then opened for him and it is said to him, ‘Rest to sleep like a newly wedded person with delightful heart.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī