Tafsir: Al-Qalam 68:20

فَأَصْبَحَتْ كَالصَّرِ‌يمِ (Thus, on the next morning, it was like a harvested field ….68:20). The word sarim means to harvest or to collect a crop from the fields'. The word sarim in the context of the verse is used in the sense of masrum or maqtu`, meaning 'harvested or cut'. This signifies that the fire burnt the field and stripped it bare. The word sarim also means 'night'. From this point of view, the verse signifies 'the field became burnt up and black like night'. [ Mazhari ].