In one report it is narrated from Sayyiduna Amr bin Yathribi (may Allah be pleased with him); he narrates: I heard the Prophet (peace and blessings be upon him) delivering a sermon at Mina, and in the sermon he said: "Nothing of his brother's property is lawful for a Muslim, except what he gives willingly." The narrator says: When I heard this, I said: "O Messenger of Allah! If I come upon my cousin's goats" - after this the narrator mentioned the hadith as before.
Ahmad recorded it, and his son in his "Ziyadat" (additions) as well, and al-Tabarani recorded it in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat. He reported the word "khabt", which is correct. The narrators of Ahmad are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البيوع / 6863