(17:23) Your Lord has decreed:

(i) Do not worship any but Him;(ii) Be good to your parents; and should both or any one of them attain old age with you, do not say to them even "fie" neither chide them, but speak to them with respect.

This commandment is very comprehensive. It prohibits not only the worship of anyone except Allah but also implies that one should obey and serve and submit to Allah alone without question. One should accept His commandments and law alone to be worthy of obedience and His authority to be supreme above all.