There are many narrations that show the virtue of the Ziyarat of Imam al-Hussayn (peace be upon him) in this blessed night, as the reward of the Ziyarat of Imam al-Hussayn (peace be upon him) either from near or afar is indescribable, noting that there are specified Ziyarat texts for this special time, the Ziyarat of the eve of mid Sha'ban. Some of these narrations are as follows:
It is narrated from Imam as-Sadeq (peace be upon him) that he said: "Imam al-Baqer (peace be upon him) was asked about the merit of the eve of the mid Sha'ban, and he (peace be upon him) said: "The most virtuous night after Laylat-ul Qadr is that of the 15th of Sha’ban, and Allah grants His blessings, during this night, to His servants and forgives them by means of His grace and greatness; hence, endeavor during this night with the intention to gain proximity to Almighty Allah. (Note that) Allah has sworn that He does not deprive any ‘beggar’ (one who earnestly requests/begs from Him) – unless the latter requests and searches for something sinful or unpleasant. This night is one which Almighty Allah has bestowed upon us, the Ahl al-Bayt, as Laylat al-Qadr was granted to the Holy Prophet."
One of the recommended and desirable acts during this night is the Ziyarat of Imam al-Hussayn (peace be upon him), as it was narrated that Imam as-Sadeq (peace be upon him) said: "The sins of the visitor of al-Hussayn Ibn Ali on the fifteenth of Sha'ban are forgiven, and no sin is written in his book for a year, and if he visits the next year, God will forgive his sins." And Imam as-Sadeq (peace be upon him) also said: "He who visits Aba Abdillah al-Hussayn (peace be upon him) three years in row without intersection on the fifteenth of Sha'ban, his sins will be forgiven," He (peace be upon him) also said: "When it is the fifteenth of Sha'ban, a caller from beyond the horizon says to the visitors of al-Hussayn: Return, forgiven and your reward is on Allah your Lord and Mohammad."
Imam Ali as-Sajjad (peace be upon him) said that if someone wishes to meet the souls of the One Hundred Twenty Four Thousand Prophets, he/she should perform the Ziyarat of Imam al-Hussayn (peace be upon him) during this night.
On the night of the 15th Sha'ban, the night of the birth of Imam al-Mahdi (may Allah hasten his holy reappearance), one of the best deeds is to recite Ziyarat of Imam al-Hussayn (peace be upon him). Sheikh Abbas al-Qummi in his Mafatih al-Jinan, says that there are many authentic hadiths regarding the rewards for those who visit Imam al-Hussayn (peace be upon him) in the middle of Sha'ban; it is as if the visitor shook hands with the 124,000 prophets.
Renewing one's allegiance to Imam al-Hussayn (peace be upon him) is renewing one's allegiance to Imam al-Mahdi (may Allah hasten his holy reappearance). Without having love for Imam al-Hussayn (peace be upon him), you are not counted as a lover of Imam al-Mahdi (may Allah hasten his holy reappearance).
This night takes its honor, holiness and sanctity from the birth of the great savior, the promised hope, the aspired good, the interpreter of the Quran, the Imam of humans and Jinns, the Master of the Advent, the Imam of the Order, our Master the awaited al-Mahdi Son of al-Hassan (may our souls and the souls of both worlds be a redemption for the soil of his arrival) on the Sahar time in the year 255 AH in Samarra.