It is narrated from Abi Maalik AI-Ashja'ee (Sa'eed bin Taariq bin Ash-yam) Radiyallahu 'Anhu that Rasulullah Sallallahu 'Alayhi Wasallam said:
"The one who sees me in ones dream, has seen me" (DE)
App reference (DE): Book 56, Hadith 3 (DE)
English reference (DE): Book 55, Hadith 391 (DE)
Arabic reference (DE): Book 56, Hadith 408 (DE)