Al-Muzzammil, The enshrouded one, Chapter #73, Verse #20

... and perform As-Salat (Iqamat-as-Salat) and give Zakat, and lend to Allah a goodly loan, and whatever good you send before you for yourselves, (i.e. Nawafil non-obligatory acts of worship: prayers, charity, fasting, Hajj and Umrah, etc.), you will certainly find it with Allah, better and greater in reward. And seek Forgiveness of Allah. Verily, Allah is Oft-Forgiving, Most-Merciful.