• The Nature and Essence of the Human Soul by Abu Mustafa Bilal al-Kanadi

• The Nafs and the Rūh by Abu Mustafa Bilal al-Kanadi

• The Connection of the Spirit to the Body by Ibn al-Qayyim al-Jawziyyah

• The Spirits are Conscripted Soldiers by Muhammad Sālih al-Munajjid

• Proofs Derived from the Divine Book which Assert that the Soul is Different from the Body by Imām Fakhrud-Dīn ar-Rāzī

• Discourse that what is Connected with the substance of the Soul is the Heart through which the Soul in Connected with the rest of the Body by Imām Fakhrud-Dīn ar-Rāzī

• The Meaning of Nafs by M. Afifi al-Akiti