Musnad Ahmad 1012:34

Abu al-Yaman and Ishaq ibn Isa narrated to us, they said: Isma'il ibn 'Ayyash narrated to us, from Abu Bakr ibn Abdullah ibn Abi Maryam, from Abu Salam—Ishaq al-A'raj said—from al-Miqdam ibn Ma'di Karib al-Kindi, that he sat with Ubadah ibn al-Samit, Abu al-Darda', and al-Harith ibn Mu'awiyah al-Kindi, and they discussed the hadith of the Messenger of Allah, peace and blessings of Allah be upon him. Abu al-Darda' said to Ubadah: "O Ubadah, [what about] the words of the Messenger of Allah, peace and blessings of Allah be upon him, in such-and-such battle, regarding the matter of the fifths?" Ubadah said—Ishaq said in his hadith—that the Messenger of Allah, peace and blessings of Allah be upon him, led them in prayer during their expedition, near a camel from the spoils. When he finished the prayer, the Messenger of Allah, peace and blessings of Allah be upon him, stood up and took a tuft of hair between his fingertips and said: "Indeed, this is from your spoils, and I have no share in it except my portion along with you, except for the fifth, and the fifth is returned to you. So, return the thread and the needle, and what is greater than that and what is smaller. Do not commit ghulul (stealing from the spoils of war), for ghulul is a fire and a shame upon its people in this world and the Hereafter. Strive against the people for the sake of Allah, the near and the far, and do not fear for the sake of Allah the blame of any blamer. Establish the prescribed punishments (hudud) of Allah in residence and during travel, and strive in the way of Allah, for striving is a great door from the doors of Paradise, through which Allah saves from worry and distress."