Sasaa bin Muawiya reported,

He came forward along with a group of men, and they found a whip. One of his companions picked it up, and the others neither instructed him to take it nor forbade him from doing so.When I arrived in Medina, we met Ubayy bin Kaab and asked him about it. He said, "I found one hundred dinars during the time of the Prophet ﷺ, so I asked the Prophet ﷺ about it. He said, 'Announce it publicly for one year.'"He repeated this instruction to him until he had mentioned three years.Ubayy said, "I said, 'Messenger of Allah!'"He replied, "Then it is yours to use as you wish."

Ahmad 21284

Sahih

حدثنا محمد بن أبي بكر المقدمي حدثنا عبد العزيز بن محمد الدراوردي حدثنا عمارة بن غزية عن سلمة بن كهيل

عن صعصعة بن صوحان قال

أقبل هو ونفر معه فوجدوا سوطا فأخذه صاحبه فلم يأمروه ولم ينهوه فقدمت المدينة فلقينا أبي بن كعب فسألناه فقال وجدت مائة دينار في زمن النبي ﷺ فسألت النبي ﷺ فقال عرفها حولا فكرر عليه حتى ذكر أحوالا ثلاثة فقلت يا رسول الله فقال شأنك بها

أحمد 21284صحيح
Contents
Reference
Commentary
Ayat
Collection
Musnad Ahmad
Book
Scholars narrating from Ubayy bin Kaab
Numbering
Darussalam 21284
Ahmad 21284