Say: 'I call only upon my Lord, and I 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 Allah, nor can I find besides Him any place of refuge: 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 Till the time when they will see what they are promised – so they will now come to know whose aide is weak, and who is lesser in number. 24 Say: 'I do not know whether that which you are promised is nigh, or whether my Lord will appoint for it a space; 25 (He is) the Knower of the Unseen, and He revealeth unto none His secret, 26 Other than an apostle He has chosen, when He makes a sentinel walk in front of him and a sentinel behind, 27 so as to make manifest that it is indeed [but] their Sustainer's messages that these [apostles] deliver: for it is He who encompasses [with His knowledge] all that they have [to say,] just as He takes count, one by one, of everything [that exists]. 28