Then do they not reflects upon the Qur'an, or Are there Locks upon Hearts? Al-Qur'an [47:24]

THEN DO THEY NOT REFLECTS UPON THE QUR'AN, OR ARE THERE LOCKS UPON HEARTS?  QUR'AN [47:24]

THEN DO THEY NOT REFLECTS UPON THE QUR'AN, OR ARE THERE LOCKS UPON HEARTS?
QUR'AN [47:24]