The Prophet ﷺ said: Allah does not accept charity from goods acquired by embezzlement as He does not accept prayer without purification.  

عَنِ النَّبِيِّ ﷺ قَالَ لاَ يَقْبَلُ اللَّهُ ﷻ صَدَقَةً مِنْ غُلُولٍ وَلاَ صَلاَةً بِغَيْرِ طُهُورٍ  

The Apostle of Allaah ( sal Allaahu alayhi wa sallam ) said : Allaah, the Exalted, does not accept the prayer of any of you when you are defiled until you performed ablution.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَقْبَلُ اللَّهُ صَلاَةَ أَحَدِكُمْ إِذَا أَحْدَثَ حَتَّى يَتَوَضَّأَ  

The key to prayer is purification; its beginning is takbir and its end is taslim.  

قَالَ رَسُولُ اللَّهِ ﷺ مِفْتَاحُ الصَّلاَةِ الطُّهُورُ وَتَحْرِيمُهَا التَّكْبِيرُ وَتَحْلِيلُهَا التَّسْلِيمُ