Hadith
Imam al-Sadiq (AS) said to one of his companions:
يَا سَدِيرُ، أَنْ تَزُورَ قَبْرَ اَلْحُسَيْنِ عَلَيْهِ اَلسَّلاَمُ فِي كُلِّ جُمْعَةٍ خَمْسَ مَرَّاتٍ وَ فِي كُلِّ يَوْمٍ مَرَّةً، قُلْتُ: جُعِلْتُ فِدَاكَ، إِنَّ بَيْنَنَا وَ بَيْنَهُ فَرَاسِخَ كَثِيرَةً فَقَالَ لِي: اِصْعَدْ فَوْقَ سَطْحِكَ، ثُمَّ تَلْتَفِتُ يَمْنَةً وَ يَسْرَةً، ثُمَّ تَرْفَعُ رَأْسَكَ إِلَى اَلسَّمَاءِ، ثُمَّ اُنْحُ نَحْوَ اَلْقَبْرِ وَ تَقُولُ: «اَلسَّلاَمُ عَلَيْكَ يَا أَبَا عَبْدِ اَللَّهِ اَلسَّلاَمُ عَلَيْكَ وَ رَحْمَةُ اَللَّهِ وَ بَرَكَاتُهُ» تُكْتَبُ لَكَ زَوْرَةٌ وَ اَلزَّوْرَةُ حَجَّةٌ وَ عُمْرَةٌ
What prevents you, O Sudair, from visiting al-Husain (AS) five times every Friday or once every day?”
I said, “May I be your sacrifice, there is a long distance between our place and his.”
He said, “Go to the roof of your house, turn your face left and right, then raise up your head towards the sky and turn to the direction of his grave and say:
«السَّلَامُ عَلَیْکَ یَا أَبَا عَبْدِ اللَّهِ، السَّلَامُ عَلَیْکَ وَ رَحْمَهُ اللَّهِ وَ بَرَکَاتُهُ»
‘Salutations to you, O Aba Abdillah! Peace be upon you, His mercy and His blessings’.
By doing this, a Ziyarat (of Imam al-Husain (AS)), a Ziyarat of Hajj and Umra are written for you.
al-Kafi, v. 4, p. 589