You shall observe the Contact Prayers (Salat) and give the obligatory charity (Zakat). Any good you send forth on behalf of your souls, you will find it at God. God is seer of everything you do.
وَأَقيمُوا الصَّلوٰةَ وَءاتُوا الزَّكوٰةَ وَما تُقَدِّموا لِأَنفُسِكُم مِن خَيرٍ تَجِدوهُ عِندَ اللَّهِ إِنَّ اللَّهَ بِما تَعمَلونَ بَصيرٌ
wa aqeemus salaata wa aatuz zakaah; wa maa tuqaddimoo li anfusikum min khairin tajidoohu ‘indal laah; innal laaha bimaa ta’maloona baseer