“Whoever finds lost property, let him ask one or two men of good character to witness it, then he should not alter it nor conceal it. If its owner comes along, then he has more right to it, otherwise it belongs to Allah (SWT), Who gives it to whomsoever He wills.” (Using translation from Ibn Mājah 2505)
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ مَنِ الْتَقَطَ لُقَطَةً فَلْيُشْهِدْ ذَوَيْ عَدْلٍ أَوْ ذَا عَدْلٍ وَلَا يَكْتُمْ وَلَا يُغَيِّبْ فَإِنْ جَاءَ صَاحِبُهَا فَهُوَ أَحَقُّ بِهَا وَإِلَّا فَهُوَ مَالُ اللهِ يُؤْتِيهِ مَنْ يَشَاءُ