ENOfficial
‘Iyad b. Himar reported God’s Messenger as saying, “He who finds Something should call one or two trusty people as witness and not conceal it or cover it up; then if he finds its owner he should return it to him, otherwise it is God’s property which he gives to whom He will.” Ahmad, Abu Dawud and Darimi transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عِيَاضِ بْنِ حِمَارٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ وَجَدَ لُقَطَةً فَلْيُشْهِدْ ذَا عَدْلٍ أَوْ ذَوِي عَدْلٍ وَلَا يَكْتُمْ وَلَا يُغَيِّبْ فَإِنْ وَجَدَ صَاحِبَهَا فَلْيَرُدَّهَا عَلَيْهِ وَإِلَّا فَهُوَ مَالُ اللَّهِ يُؤْتِيهِ مَنْ يَشَاءُ» . رَوَاهُ أَحْمَدُ وَأَبُو دَاوُدَ وَالدَّارِمِيُّ
sunnah.com