(Have they not observed) i.e. the disbelievers of Mecca (what is before them) what is above and below them of the sky and the earth (and what is behind them) and what is above and below them (of the sky and the earth? If We will, We can make the earth swallow them, or cause obliteration from the sky to fall on them) and thus destroy them. (Lo! herein) in what I have mentioned concerning the sky and the earth (surely is a portent) a lesson (for every slave who turneth (to Allah) repentant) who hastens to Allah and to His obedience.