Ibrahim b. Adham (RA) met with Hadhrat Khidr (A.S), this is mentioned in Hazrat Ali bin Usman Hujveri’s Kashful Mahjoob, as follows, (Pg 183) “During that time khidr consorted with me and taught me the Great Name of God (Isme Azam). Then my heart became wholly empty of ‘other’ (ghayr)”
Also, Hazrat Khidr’s life story is mentioned in Ibn Kathir’s Qasas-ul-Anbiya, and also, after The Prophet Muhammad (SAW) passed away, a man in green with a white beard came in and started crying, after he left, Hazrat Ali said that he was Hazrat Khidr (A.S).
According to Bahar-e-Shariat, Volume 1, it “All Anbiya Alaihimus Salam are in reality, Alive” as “Allah has made it Haram on the earth to devour the bodies of Prophets” (Prophet Muhammad (S.A.W.)
In Fatawa-e-Rizviyaa and bahar-e-Shariat, it is mentioned that Prophet’s view the whole nation as if it was revolving through their hands
Thank-you,
Jazakallah