It is narrated from Sayyiduna Zayd bin Khalid al-Juhani (may Allah be pleased with him): We were with the Prophet Muhammad (peace and blessings be upon him) at Khaybar when a man from the tribe of Ashja‘ died. The Prophet (peace and blessings be upon him) did not lead his funeral prayer and said: "You perform the funeral prayer of your companion." (Later) the noble Companions (may Allah be pleased with them) looked into his belongings and found among them some beads of the Jews, which were not even equal to two dirhams.
Hadith Referenceالسنن المأثورة / باب الجهاد / 618
Hadith Takhrijسنن ابی داؤد، الجهاد، باب فى تعظيم الغلول، رقم: 2710 وقال الالبانی صحیح، سنن ابن ماجه، الجهاد، باب الغلول، رقم: 2848۔