Say, [O Muhammad], "I only invoke my Lord and do not associate with Him anyone." 20 Say, "I do not possess any power to harm or benefit you". 21 Say, "Surely no one can protect me against God, nor can I find besides Him any place of refuge. 22 But [I have for you] only notification from Allah, and His messages." And whoever disobeys Allah and His Messenger - then indeed, for him is the fire of Hell; they will abide therein forever. 23 At length, when they see (with their own eyes) that which they are promised,- then will they know who it is that is weakest in (his) helper and least important in point of numbers. 24 Say: I do not know whether that with which you are threatened be nigh or whether my Lord will appoint for it a term: 25 He [alone] knows that which is beyond the reach of a created being's perception, and to none does He disclose aught of the mysteries of His Own unfathomable knowledge, 26 Other than an apostle He has chosen, when He makes a sentinel walk in front of him and a sentinel behind, 27 That He may know that they have preached the message of their Lord. And He comprehendeth whatever is with them, and He keepeth count of everything numbered. 28