A: Yes, among these requirements are placing trust in Allah, believing the Prophet (peace be upon him), believing that Allah (Glorified and Exalted be He) is AlHaqq (the Truth) and that He never says anything but the truth, being sincere with Allah and following His Messenger's path. Additionally, the believer should say these Adhkar while placing his trust in Allah and hoping to obtain what Allah has. He should be a true believer that Allah is the One Who manages and disposes the affairs and that He is Omnipotent over all things with no doubt or ill thoughts. He should be certain that if his desire delays or does not occur, this will be for some underlying wisdom.