Forty Hadiths On Ramadan
Hadith No. 13
Ramadan: The Best of the Months
Imam Sadiq (A.S.) said: The best of the months is the month of God - the month of Ramadan - and the heart of the month of Ramadan is the Night of Qadr (Lailatul Qadr).
Bihar al-Anwar, vol. pg. 386