I was listening to a talk by Sheikh Omar Suleiman titled 'purification of the soul' in which he quoted the hadith:

"In every day and every night, during the month of Ramadan, there are people to whom Allah grants freedom from the Fire, and there is for every Muslim a supplication which he can make and will be granted". [al-Bazzaar, Ahmad and Ibn Majah; Sahih]

and this in turn reminded me of surah al fatiha where Allah says he is 'The Beneficent, the Merciful'.