Chapter on Instructing the Dying (Talqin al-Muhtadarin)
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 23
وَ بِهَذَا اَلْإِسْنَادِ عَنْ سَعْدِ بْنِ طَرِيفٍ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ قَالَ:« مَنْ حَفَرَ لِمَيِّتٍ قَبْراً كَانَ كَمَنْ بَوَّأَهُ بَيْتاً مُوَافِقاً إِلَى يَوْمِ اَلْقِيَامَةِ».
And through this chain of narrators, from Sa'd ibn Tarif, from Abu Ja'far عليه السلام, who said:
Imam عليه السلام said: "Whoever digs a grave for a deceased person, it is as if he has prepared a suitable house for him until the Day of Resurrection."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 477
- Ṣaḥīḥ al-Tahdhīb