Dua to be recited on the twenty first day of Ramadhan

اللهمّ اجْعَلْ لی فیهِ الى مَرْضاتِکَ دلیلاً ولا تَجْعَل للشّیْطان فیهِ علیّ سَبیلاً واجْعَلِ الجَنّةِ لی منْزِلاً ومَقیلاً یا قاضی حَوائِجَ الطّالِبین. 

O Allah, on this day, show me the way to win Your pleasure, do not let Shaytan have a means over me, make Paradise an abode and a resting place for me, O the One who fulfills the requests of the needy.