Kitab al-Kharaj by Abu Yusuf, p. 144
“yani yeh hai aap ka khud sakhta woh qital hai, khud sakhta jihad hai, khud sakhta jang hai. is tarah se Umar ibn Abdul Aziz ke zamane mein ek governor se unhon ne kaha tha ke wa'ak in Muhammad (SAW) bo'is hadiyan wa lam yub'as jabiyan. tumhara bura ho, Muhammad sallallahu alaihi wasallam bheje gaye the hidayat ke liye, tax”