Anas ibn Malik (may Allah be pleased with him) reported that one year, when the month of Ramadan started, the Prophet (peace and blessings be upon him) said:
This month (of Ramadan) has begun and there is a night in it better than one thousand month. (So,) any one deprived of its (blessings) is actually deprived of all goodness. Indeed, He is truly deprived who is kept away from its good.
(Ibn Majah and authenticated by Al-Albani)