'Amr bin Al-'as (May Allah be pleased with him) used to say:
"When you have buried me, keep standing near my grave till (for the time it takes to) a camel is slaughtered and its meat is distributed, so that I may feel your nearness and know what to reply to the angels sent by my Rubb."[Muslim]. (PT)
App reference (PT): Book 7, Hadith 53 (PT)
Arabic/English book reference (PT): Book 7, Hadith 947 (PT)