Ibn 'Umar (RAA) narrated, 'On our expeditions, we used to get honey and grapes (as spoi1s) and eat them while on our military expeditions, without bringing them to the Prophet (or whoever is in charge of distributing the spoils).' Related by Al-Bukhari. Abu Dawud narrated, 'The fifth was not taken from them.' Ibn Hibban graded it as Sahih.
English reference: Book 11, Hadith 1334
Arabic reference: Book 11, Hadith 1307