فَأُمُّهُ هَاوِيَةٌ

His refuge will be an abyss.

Tafsir al-Baidawi                                                                                                                       تفسیر البیضاوی                                            

فَأُمُّهُ هاوِيَةٌ فمأواه النار المحرقة والهاوية من أسمائها

His refuge will be the blazing hell.  Al-Haawiyah is one of its names.

Tafsir al-Baidawi (Anwaar al-Tanzeel wa Asraar al-Taweel) of Imam Qadhi Abdullah ibn Umar al-Shiraazi al-Baidawi t D. 685 A.H.