The Invocation of Sha'ban as prescribed by Amir al Mo'mineen, Imam Ali ibn Abu Talib (as). It is very recommended to recite it during the month of Sha'ban, but it can also be read at any other time of the year. The words and meaning are extremely profound and beautiful. Spend time, reflect and ponder through this holy dua. Whisper and speak to Allah swt through the words in this dua, in order to gain closeness to Him.
"This is the prayer of Imam `Ali Amir al-Mu'mineen and the Holy Imams, his descendants, (a.s) who used to recite it in the month of Sha`ban."
Imam Khomeini (ra) used to recommend people to recite this munajat alot, and was very fond of it. He would even end some of his classes by finishing with some verses from this dua.