Kāmil al-Ziyārāt > Those Who Go to the Ziyārah of Ĥusain (a.s.) Are the Neighbours of the Messenger of Allāh, the Commander of the Believers, and Fāťimah (a.s.)
Hadith #3

3 حَدَّثَنِي مُحَمَّدُ بْنُ هَمَّامِ بْنِ سُهَيْلٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدِ بْنِ مَالِكٍ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عِمْرَانَ قَالَ حَدَّثَنَا الْحَسَنُ بْنُ الْحُسَيْنِ اللُّؤْلُؤِيُّ عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ عَنْ مُحَمَّدِ بْنِ أَيُّوبَ عَنِ الْحَرْثِ بْنِ الْمُغِيرَةِ النَّصْرِيِّ عَنْ أَبِي عَبْدِ اللَّهِ (ع) قَالَ إِنَّ اللَّهَ تَبَارَكَ وَ تَعَالَى جَعَلَ مَلَائِكَةً مُوَكَّلِينَ بِقَبْرِ الْحُسَيْنِ (ع) فَإِذَا هَمَّ الرَّجُلُ بِزِيَارَتِهِ وَ اغْتَسَلَ نَادَى مُحَمَّدٌ (ص) يَا وَفْدَ اللَّهِ أَبْشِرُوا بِمُرَافَقَتِي فِي الْجَنَّةِ وَ ذَكَرَ الْحَدِيثَ

3. Muĥammad ibn Hammām ibn Suhayl narrated to me from Ja’far ibn Muĥammad ibn Mālik, from Muĥammad ibn ‘Imrān, from Ĥasan ibn Ĥusain Al-Lu`lu`i, from Muĥammad ibn Ismā’ǐl, from Muĥammad ibn Ayyūb, from Ĥārith ibn Mughǐrah Al-Našri, who said: Abū ‘Abdillāh (Imam Šādiq (a.s.)) said: Allāh, the Blessed and the Exalted, has dedicated some angels to the grave of Ĥusain (a.s.). When someone decides to go to the Ziyārah of Ĥusain (a.s.) and performs Ghusl, Muĥammad (s.a.a.w.) will call out to him, “O guest of Allāh! Be delighted for you will join me in Paradise.”