Visitors are Ahlul Bayt’s neighbours

Abū Usāma recounts: Imām Ṣādiq^(a) once said, "Whoever wishes to be in the proximity of Prophet Muḥammad^(p), Amīr al-Muʼminīn^(a), and Lady Fāṭima^(a), should not neglect the ziyārah of Ḥusayn b. ʿAlī^(a)."

As narrated by Abū Baṣīr: I once heard Imām Bāqir^(a) say, "Those who yearn for their eternal home to be Heaven must not overlook the ziyārah of the 'Oppressed One'." Intrigued, I asked, "Who is this 'Oppressed One'?" The Imām^(a) clarified, Ḥusayn b. ʿAlī^(a), the Master of Karbalā. Allah will place those who lovingly perform his ziyārah, brimming with longing and affection for The Messenger of Allah^(p), Lady Fāṭima^(a), and Amīr al-Muʼminīn^(a), at the heavenly banquet. They will be dining alongside them while others are still in judgement."

Imām Ṣādiq^(a) said, "Allah has assigned angels to the tomb of Ḥusayn^(a). When an individual resolves to perform the ziyārah of Ḥusayn^(a) and undergoes the ritual purification, ghusl, Prophet Muḥammad^(p) will herald to them, "O' guests of Allah! Rejoice, for you are destined to join me in Heaven."