Say:"I invoke only my Lord, and I associate none as partners along with Him."meaning, when they harmed him, opposed him, denied him and stood against him in order to thwart the truth he came with, and to unite against him, the Messenger said to them إِنَّمَا أَدْعُو رَبِّي (I invoke only my Lord),meaning, `I only worship my Lord alone, and He has no partners. I seek His help and I put my trust in Him.' وَلَا أُشْرِكُ بِهِ أَحَدًا (and I associate none as partners along with Him). The Messenger does not have Power to harm or give Guidance Concerning Allah's statement,قُلْ إِنِّي لَا أَمْلِكُ لَكُمْ ضَرًّا وَلَا رَشَدًا