Abu Huraira related that the Prophet (peace and blessings be upon him) said: Whoever fasts during Ramadan with faith and seeking his reward from Allah will have his past sins forgiven. (Bukhari, Muslim).
“Barangsiapa yang berpuasa pada bulan Ramadhan dengan penuh keimanan dan pengharapan maka akan diampuni dosa-dosanya yang telah lalu.” (HR. Bukhari dan Muslim)