[Machine] He heard Zaid bin Khalid Al-Juhani, the companion of the Messenger of Allah ﷺ , saying: The Messenger of Allah ﷺ was asked about picking up gold or silver. He said, 'Acquire knowledge about its markings and specifications, and then identify it for a year. If it is not recognized, then spend it and let it be a trust with you. If its seeker comes one day, return it to him.' This narration is mentioned in Sahih from the Hadith of Sulaiman bin Bilal.
أَنَّهُ سَمِعَ زَيْدَ بْنَ خَالِدٍ الْجُهَنِيَّ صَاحِبَ رَسُولِ اللهِ ﷺ يَقُولُ سُئِلَ رَسُولُ اللهِ ﷺ عَنِ اللُّقَطَةِ الذَّهَبِ أَوِ الْوَرِقِ فَقَالَ اعْرِفْ وِكَاءَهَا وَعِفَاصَهَا ثُمَّ عَرِّفْهَا سَنَةً فَإِنْ لَمْ تُعْرَفْ فَاسْتَنْفِقْهَا وَلْتَكُنْ وَدِيعَةً عِنْدَكَ فَإِنْ جَاءَ طَالِبُهَا يَوْمًا مِنَ الدَّهْرِ فَأَدِّهَا إِلَيْهِ أَخْرَجَاهُ فِي الصَّحِيحِ مِنْ حَدِيثِ سُلَيْمَانَ بْنِ بِلَالٍ