وَطَهَارَةُ الْجَسَدِ وَالثَّوْبِ وَالْمَكَانِ مِنْ نَجَسٍ غَيْرِ مَعْفُوٍّ عَنْهُ
The body, clothing and relevant prayer place must be free of physical impurity beyond the legally excused amount. The impurity rules and excused quantities studied in Taharah apply here.