Recognise well the strap and the bag (containing) that and then make an announcement regarding that for one year, but if none recognises it, then spend that and it would be a trust with you; and if someone comes one day to make demand of that, then pay that to him. He (the inquirer) asked about the lost camel, whereupon he said: You have nothing to do with that. Leave that alone, for it has feet and also a leather bag, it drinks water, and eats (the leaves) of the trees. He asked him about sheep, whereupon he said: Take it, it is for you, or for your brother, or for the wolf.
Sahih Muslim Book 31, Hadith 5
"There was a household among us called Banu Ubairiq, among whom was a Bishr, a Bushair, and a Mubashshir. Bushair was a hypocrite who would recite poetry reviling the Companions of the Prophet (ﷺ) then he would attribute it to some of the Arabs. Then he would say: 'So-and-so said this and that from what you said to Qatadah. 'Certainly Allah is Oft-Forgiving, Most Merciful. And argue not on behalf of those who deceive themselves. Verily, Allah does not like anyone who is a betrayer, sinner. They may hide from men, but they cannot hide from Allah for He is with them up to His saying: 'Most Merciful.' That is: If you seek Allah's forgiveness then He will forgive you. 'And whoever earns sin, he earns it only against himself...' up to His saying: 'A manifest sin.' Their saying about Labid; 'Had it not been for the grace of Allah and His Mercy upon you...' up to His saying: 'We shall give him a great reward.' (4:105-115)" So when the Quran was revealed, the Messenger of Allah (ﷺ) brought the weapon and returned it to Rifa'ah. Qatadah said: "When the weapon was brought to my uncle - and he was an elderly man with bad sight" or "an elderly weak man" - Abu 'Eisa was in doubt - "in Jahiliyyah, and I thought that he merely had entered into Islam (without real sincerity) but when I brought it to him, he said: 'O my nephew! It is for Allah's cause.' So I knew that his Islam was genuine. When the Quran was revealed, Bushair went with the idolaters, staying with Sulafah bint Sa'd bin Sumayyah. So Allah, Most High, revealed: Whoever contradicts and opposes the Messenger after the right path has been shown clearly to him, and follows other than the believers' way, We shall keep him in the path he has chosen, and burn him in Hell - what an evil destination. Verily Allah forgives not associating others with Him, but He forgives what is less than that for whomever He wills. And whoever associates others with Allah, then he has indeed strayed away (4:115-116). "When he went to stay with Sulafah, Hassan bin Thabit lampooned her with verses of poetry. So she took his saddle, put it on her head, then she left with it to cast into the valley. Then she said: 'You gave me the poetry of Hassan - you did not bring me any good.'"
Jami` at-Tirmidhi Book 47, Hadith 88