سَمِعْتُ الرِّضَا ع يَقُولُ إِنَّ لِكُلِّ إِمَامٍ عَهْداً فِي عُنُقِ أَوْلِيَائِهِ وَ شِيعَتِهِ وَ إِنَّ مِنْ تَمَامِ الْوَفَاءِ بِالْعَهْدِ وَ حُسْنِ الْأَدَاءِ زِيَارَةَ قُبُورِهِمْ فَمَنْ زَارَهُمْ رَغْبَةً فِي زِيَارَتِهِمْ وَ تَصْدِيقاً بِمَا رَغِبُوا فِيهِ كَانَ أَئِمَّتُهُمْ شُفَعَاءَهُمْ يَوْمَ الْقِيَامَةِ.
"Indeed, every Imam has a covenant upon his supporters and followers. And among the complete fulfillment of the covenant and good performance is the visitation of their graves. So whoever visits them out of desire for visiting them and in affirmation of what they desired will have their Imams as their intercessors on t