A Quranic Journal: Surah al-Ma'arij ayah 16

Ibn Abbas and Mujahid both said, "It is the skin of the head". Al-Hasan Al-Basri and Thabit Al-Bunani both said, "This means respectable parts of the face". Qatadah said, "This means removing his important organs, and the respectable parts of his face, his creation and his limbs". Ad-Dahhak said, "This means it will scrape the flesh and the skin off of the bone until it leaves nothing of it remaining". Ibn Zayd said, "The Shawa is the marrow of the bones"