Nafs signifies "breath, ego, soul, or self," and refers to the three types of soul in kabbalistic psychology:
- nafs al-Ammara, Nephesh
- nafs-e-lawwama, Ruach
- nafs-e-mutmainna, Neshamah
Al nafs al-iblissiyya
are the "breaths," "souls," and lunar fires of Iblis, the ego, the pluralized self or selves.
The Sufis always state that must guard our breaths against God Most High, to not speak vain things... Habel, Habilim...
The following lecture referenced below talks about them in relation to the Qur'an.