Imam Ghazzali, Ihwa' 'ulum al-din, p. 57

Ibid., p. 130

Imam Muslim, Al-Sahih, p. 29

Imam Bukhan, Al-Sahih, p. 554 of the translation by O. Houdas

Ibid., p. 166

Imam Abd al-Rahman Ibn al-fawzi, Dhamm al-hawa, p. 29

Ibid., p. 197

Ibn Qayyim al-Jawzia, Rawdat al-muhibbin, p. 3

Ibid., p. 24

Imam Abd al-Rahman Ibn al-Jawzi, Dhamm al-hawa, p. 39