This Dua’a is accredited to Imam Mahdi (ajtfs) .It is recited to drive away the enemy, to dispel the spell of magic or sorcery, and to seek fulfillment of desires, material as well as spiritual.It is a tested and approved supplication.It is better to recite it after midnight, nevertheless it should be recited whenever occasion demands, or may be recited as many times as you like.