"The Messenger of Allah said: 'Allah does not accept any Salat (prayer) without purification, and He does not accept any charity from Ghulul.'" (Using translation from Ibn Mājah 274)
قَالَ رَسُولُ اللهِ ﷺ لَا يَقْبَلُ اللهُ تَعَالَى صَدَقَةً مِنْ غُلُولٍ وَلَا صَلَاةً بِغَيْرِ طُهُورٍ