Quran 2:110

وَأَقِيمُواْ ٱلصَّلَوٰةَ وَءَاتُواْ ٱلزَّڪَوٰةَ‌ۚ وَمَا تُقَدِّمُواْ لِأَنفُسِكُم مِّنۡ خَيۡرٍ۬ تَجِدُوهُ عِندَ ٱللهِ‌ۗ إِنَّ ٱللَّهَ بِمَا تَعۡمَلُونَ بَصِيرٌ۬ ١١٠

You shall observe the Salat (Contact Prayer) and give the Zakat (Obligatory Charity). Any good you send forth on behalf of your souls, you will find it at ALLAH. ALLAH is seer of everything you do.