Musannaf Ibn Abi Shaybah 23001 — Lost property: what is to be done

It is narrated from Sayyiduna Abu Aqrab (may Allah be pleased with him) that he said: I found a bag of money. I came to Sayyiduna Umar (may Allah be pleased with him) and said: "O Commander of the Believers! Please become my deputy in safeguarding it on my behalf." He (may Allah be pleased with him) said: "Announce it during the days of Hajj." I announced it during the days of Hajj but did not find its owner. I came to him (may Allah be pleased with him) again and said: "Please become my deputy in safeguarding it on my behalf." He (may Allah be pleased with him) said: "Shall I not tell you of a better way? Give it away in charity. If the owner then comes and asks for the money, you are liable for the loss and the reward of the charity will be yours; and if he seeks the reward, the reward will be his and you will have whatever you intended."