Al-Kāfi - Volume 3 > Using Clay or Lime over the Grave
Hadith #3

3ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنِ ابْنِ مَحْبُوبٍ عَنْ يُونُسَ بْنِ يَعْقُوبَ قَالَ لَمَّا رَجَعَ أَبُو الْحَسَنِ مُوسَى (عَلَيْهِ الْسَّلام) مِنْ بَغْدَادَ وَمَضَى إِلَى الْمَدِينَةِ مَاتَتْ لَهُ ابْنَةٌ بِفَيْدَ فَدَفَنَهَا وَأَمَرَ بَعْضَ مَوَالِيهِ أَنْ يُجَصِّصَ قَبْرَهَا وَيَكْتُبَ عَلَى لَوْحٍ اسْمَهَا وَيَجْعَلَهُ فِي الْقَبْرِ.

3. A number of our people have narrated from Sahl ibn Ziyad ibn Mahbub from Yunus ibn Ya’qub who has said the following: “When abu al-Hassan, ‘Alayhi al-Salam, returned from Baghdad to al-Madinah, one of his daughters died in Fayd. He (the Imam) buried her and commanded certain people of his followers to build her grave with lime, write her name on the tombstone and place it on the grave.”