Narrated Sahl bin Sad: The Prophet (peace be upon him) said, “Paradise has eight gates, and one of them is called Ar-Raiyan through which none will enter but those who observe fasting.” The Prophet (peace be upon him) also said, “If a person spends two different kinds of something (for Allah’s cause), he will be called from the gates of Paradise.”

Sahih Al-Bukhari – Book 54 Hadith 479