By the earth and Ma Tahaha.Mujahid said,"Tahaha means He spread it out."Al-`Awfi reported from Ibn `Abbas that he said, وَمَا طَحَـهَا (and Ma Tahaha.), "This means what He created in it." ` Ali bin Abi Talhah reported from Ibn Abbas that he said,"Tahaha means that He proportioned it."Mujahid, Qatadah, Ad-Dahhak, As-Suddi, Ath-Thawri, Abu Salih and Ibn Zayd all said that طَحَـهَا (Tahaha) means, He spread it out.Allah then says,وَنَفْسٍ وَمَا سَوَّاهَا