Good Manners and Form (Al-Adab)

Bukhari :: Book 8 :: Volume 73 :: Hadith 214

Narrated Isma'il:

I asked Abi Aufa, "Did you see Ibrahim, the son of the Prophet ?" He said, "Yes, but he died in his early childhood. Had there been a Prophet after Muhammad then his son would have lived, but there is no Prophet after him."