Say, [O Muhammad], "I only invoke my Lord and do not associate with Him anyone." 20 Say: "It is not in my power to cause you harm, or to bring you to right conduct." 21 Say: “None can protect me from Allah, nor can I find a refuge apart from Him. 22 (My task is no more than) to deliver Allah's proclamation and His messages. And whoever disobeys Allah and His Messenger, surely the Fire of Hell awaits him; therein he will abide in perpetuity.” 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 which you are promised is near, or whether my Lord will set for it a time. 25 The Knower of the unseen! so He does not reveal His secrets to any, 26 "Except a messenger whom He has chosen: and then He makes a band of watchers march before him and behind him, 27 [He (Allah) protects them (the Messengers)], till He sees that they (the Messengers) have conveyed the Messages of their Lord (Allah). And He (Allah) surrounds all that which is with them, and He (Allah) keeps count of all things (i.e. He knows the exact number of everything). 28