“A. scorching heat.” According to the commentator, al-Baghawi it is the special division of hell set apart for the Magi. It is mentioned thus in the Qur’an Surah liv. 48: .” Taste ye the touch of saqar.”
Surah lxxiv. 26: “I will broil him in saqar! And what shall make thee know what saqar is?” it leaveth nought and spareth nought, blackening the skin of man.
Based on Hughes, Dictionary of Islam