The luminous nights [Layali bayda'] of Sha'ban..

Sha'ban is a great holy month, and many narrations have been reported about the merits of the month of Sha’ban and the great rewards obtained from practicing devotional acts during it.. Sayed Ibn Taqus wrote in his book "Iqbal Al-A'mal": "And know that the month of Sha;ban is a month of great regard, it includes a night in which the Almighty Allah has saved with the born in it, the lights of Islam and faith that the people of agression was about to extinguish.." until he said: "It is one of the phases in which the people of belief enjoy its benefits, and it is enoguh honor for this month, that the Great Prophet (Allah's prayers be upon him and his holy Household) said about it: “Sha’ban is a month dedicated to me. Whoever keeps one fast during my month will definitely go to heaven”.
The luminous nights of the month of Sha'ban have also great status, as the Almighty Allah has extended His mercy for those who work during them, by giving them indescribable gifts. Thus, it behooves for the faithful to take advantage of the reward of the works of these nights. The luminous nights are the eves of the thirteenth, fourteenth and fifteenth of Sha'ban.
It is highly desirable [Mustahabb] to observe fast on 13, 14 and 15, have a bath each day, and give alms in the way of Allah. The recommended acts during these nights are: the first night, it is recommended to pray two rak'at, reciting in each of them after the chapter of Fatiha, chapter Yaseen, chapter Al-Mulk and then chapter Ikhlass. The second night, praying four rak'at in the same way and in the third night praying six rak'at in the same way. In addition to other acts for this holy night that one can find in the supplication books such as Mafatih Al-Jinan.
And it is narrated from Imam As-Sadeq (peace be upon him) that he who perform these acts will have the reward of the work in the holy months of Rajab, Sha'ban and the month of Ramadan, and all his sins will be forgiven.