The Messenger of Allah (SWAS) was asked about a find. He replied : Make the matter known for a year; if its owner comes, give it to him, otherwise note its string and its container and have it along with your property. If its owner comes, deliver it to him.  

أَنَّهُ قَالَ سُئِلَ رَسُولُ اللَّهِ ﷺ فَذَكَرَ نَحْوَ حَدِيثِ رَبِيعَةَ قَالَ وَسُئِلَ عَنِ اللُّقَطَةِ فَقَالَ تُعَرِّفُهَا حَوْلاً فَإِنْ جَاءَ صَاحِبُهَا دَفَعْتَهَا إِلَيْهِ وَإِلاَّ عَرَفْتَ وِكَاءَهَا وَعِفَاصَهَا ثُمَّ أَفِضْهَا فِي مَالِكَ فَإِنْ جَاءَ صَاحِبُهَا فَادْفَعْهَا إِلَيْهِ  

[Machine] He said, "The Messenger of Allah, ﷺ , was asked about a stray sheep. He said, 'It belongs to you, your brother, or the wolf.' He was asked about a camel, and he became angry and his face turned red. He said, 'It has its water bag and its owner's shoes, and it grazes the trees.' He was asked about expenditure, and he said, 'You should define it in details. If its owner comes, you give it to him. Otherwise, you know its wool or its back, then you dispose of it to its owner. If its owner comes, you give it to him.'"  

أَنَّهُ قَالَ سُئِلَ رَسُولُ اللهِ ﷺ عَنِ الشَّاةِ الضَّالَّةِ فَقَالَ لَكَ أَوْ لِأَخِيكَ أَوْ لِلذِّئْبِ وَسُئِلَ عَنِ الْبَعِيرِ فَغَضِبَ وَاحْمَرَّ وَجْهُهُ فَقَالَ مَعَهُ سِقَاؤُهُ وَحِذَاؤُهُ يَرِدُ الْمَاءَ وَيَرْعَى الشَّجَرَ وَسُئِلَ عَنِ النَّفَقَةِ فَقَالَ تُعَرِّفُهَا حَوْلًا فَإِنْ جَاءَ صَاحِبُهَا دَفَعْتَهَا إِلَيْهِ وَإِلَّا عَرَفْتَ وِكَاءَهَا أَوْ عِفَاصَهَا ثُمَّ أَفَضْتَهَا فِي مَالِكَ فَإِنْ جَاءَ صَاحِبُهَا دَفَعْتَهَا إِلَيْهِ