Or have they not observed the things which God has created which cast a shadow such as trees or a mountain how their shadows incline to the right and to the left shamā’il is the plural of shimāl in other words towards both sides at the beginning of the day and at its end prostrating to God sujjadan is a circumstantial qualifier that is to say subservient to Him with respect to what is required of them and how they the shadows are subject? humbled they the shadows are likened to rational beings in this description.