Imam Jaa’- far As Saadiq (a.s.) used to recite the following dau’a, everyday, in the month of Rajab, after Fajr and Maghrib prayers:

O he from whom I ask for and expect fulfillment in every good (I do); and in whom I confide to seek safety from His displeasure for every evil I do !

O He who gives much in return of very little (good deeds)! O He who puts into the hands of the supplicant what he asks for, O He who (also) let needy, who does not ask for, have what he needs, though he remembers Him not, Feels compassion, and takes pity on them !

Give me as a gift good in all my objectives in this world and in the Hereafter, let me free myself from evil in all my activities in this world and in the Hereafter, because, surely, what Thou gives never goes waste or grows less, and from Thy bounties let me have more and more O the Generous compassionate !