Kāmil al-Ziyārāt > That Which Should be Recited Before Eating from the Dust of the Grave of Ĥusain (a.s.)
Hadith #2

2 قَالَ وَ رَوَى لِي بَعْضُ أَصْحَابِنَا يَعْنِي مُحَمَّدَ بْنَ عِيسَى قَالَ نَسِيتُ إِسْنَادَهُ قَالَ إِذَا أَكَلْتَهُ تَقُولُ اللَّهُمَّ رَبَّ هَذِهِ التُّرْبَةِ الْمُبَارَكَةِ وَ رَبَّ هَذَا الْوَصِيِّ الَّذِي وَارَتْهُ صَلِّ عَلَى مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ اجْعَلْهُ عِلْماً نَافِعاً وَ رِزْقاً وَاسِعاً وَ شِفَاءً مِنْ كُلِّ دَاءٍ

2. My father narrated to me from Sa’d ibn ‘Abdillāh, from Muĥammad ibn ‘Isā, who narrated the following through a chain which he had forgotten: When you eat the clay of the grave of Ĥusain (a.s.), you should say: O Lord of this blessed dust! And O Lord of this Successor who is buried in it! Send Your blessing on Muĥammad and the family of Muĥammad and make it (the cause of) beneficial knowledge and extensive sustenance (for me) and my cure from every disease.