41. Fussilat (Explained In Detail)

Surah: 41   Aya: 10

10. WajaAAala feeha rawasiya min fawqiha wabaraka feeha waqaddara feeha aqwataha fee arbaAAati ayyamin sawaan lilssa-ileena
  

  Translation

10. He placed therein (i.e. the earth) firm mountains from above it, and He blessed it, and measured therein its sustenance (for its dwellers) in four Days equal (i.e. all these four 'days' were equal in the length of time), for all those who ask (about its creation).