Yahya related to me from Malik from more than one reliable sourcethat Sad ibn Abi Waqqas and Said ibn Zayd ibn Amr ibn Nufayl died atal-Aqiq and were carried to Madina and buried there. (ES)
USC-MSA web (English) reference: Book 16, Hadith 31 (ES)
Arabic reference (ES): Book 16, Hadith 553 (ES)