It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that in the time of the Messenger of Allah (peace and blessings be upon him) an army took food and honey as spoils, and the khumus (one-fifth) was not taken from them.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13315