The Messenger (peace and blessings of Allaah be upon him) did not extend his hand to anyone from his grave
Question

                What is the correct opinion about the stories narrated from one of the famous Sufi leaders, al-Sayyid Ahmad al-Rifaa’i, which say that he visited the Mosque of the Prophet (peace and blessings of Allaah be upon him) in Madeenah and made du’aa’ at his grave, and the Messenger (peace and blessings of Allaah be upon him) reached his hand out to him and he kissed it? This is a widespread belief among the followers of his tareeqah and it is a belief they hold firmly, even though he lived in the 6th century AH. How true is this story?
Praise be to Allah.This is false and has no basis of truth, because the Prophet 
           (peace and blessings of Allaah 
          be upon him) died as decreed by Allaah and as Allaah said (interpretation 
          of the meaning): 
“Verily you (O Muhammad) will 
          die and verily, they (too) will die” [al-Zumar 
          39:30]   
According to a saheeh hadeeth, the Prophet  
          (peace and blessings of Allaah be upon him) said: “Allaah has angels 
          who travel about in the earth and convey to me the salaams of my ummah.”  
          
And he  (peace and blessings of 
          Allaah be upon him) said: “There is no one who sends salaams upon me 
          but Allaah will restore my soul to me so that I may return his salaam.”  
          
And he  (peace and blessings of 
          Allaah be upon him) said: “The best of your days is Friday, so send 
          more blessings (salaah) upon me on that day, for your blessings will 
          be shown to me.” They said, “O Messenger of Allaah, how will they be 
          shown to you when you (your body) have disintegrated?” He said, ‘Allaah 
          has forbidden the earth to consume the bodies of the Prophets.”  
          
And there are many ahaadeeth which say similar things, 
          but it is not narrated anywhere that the Prophet  
          (peace and blessings of Allaah be upon him) said that he would shake 
          hands with anybody. This indicates that this story is false. Even if 
          we were to assume that it is true, then it could be that that was a 
          shaytaan (devil) who shook hands with him in order to deceive him and 
          lead him and others astray. What all Muslims have to do is to fear Allaah 
          and to adhere to His sharee’ah which is indicated in His Book and in 
          the Sunnah of His trustworthy Messenger, and to beware of anything that 
          goes against that. May Allaah reform the Muslims and grant them understanding 
          of His religion and cause them to adhere to His sharee’ah, for He is 
          the Most Generous, Most Kind.