Sahih Bukhari
Lost Things Picked up by Someone (Luqaata)
Volume: 003 / Book Number: 042 / Hadith Number: 617
Narrated Salama:
the above narration (Hadith 616) from Ubai bin Ka'b: adding, "I met the sub-narrator at Mecca later on, but he did not remember whether Ka'b had announced what he had found one year or three years."