It is narrated about Sayyiduna Abu Ruhm al-Ghifari (may Allah be pleased with him) and his brother that the two of them were horsemen on the day of Khaybar, so they were given six shares: four for their two horses and two shares for the two of them. They sold those two shares for two young camels.
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16469