If you failed to give to charity before conferring, then repented thereafter, God accepts your repentance. You shall observe the contact prayers (Salat), give the obligatory charity (Zakat), and obey God and His messenger. God is fully Cognizant of everything you do.
ءَأَشفَقتُم أَن تُقَدِّموا بَينَ يَدَى نَجوىٰكُم صَدَقٰتٍ فَإِذ لَم تَفعَلوا وَتابَ اللَّهُ عَلَيكُم فَأَقيمُوا الصَّلوٰةَ وَءاتُوا الزَّكوٰةَ وَأَطيعُوا اللَّهَ وَرَسولَهُ وَاللَّهُ خَبيرٌ بِما تَعمَلونَ
‘a-ashfaqtum an tuqaddimoo baina yadai najwaakum sadaqaat; fa-iz lam taf’aloo wa taabal laahu ‘alaikum fa aqeemus Salaata wa aatuz Zakaata wa atee’ul laaha wa rasoolah; wallaahu khabeerum bimaa ta’maloon