This hadeeth comes under the following chapter: THE REWARD OF ONE WHO FOUGHT AND GOT HIS SHARE OF THE BOOTY AND OF ONE (WHO FOUGHT) BUT DID NOT GET ANY BOOTY
It has been narrated on the authority of 'Abdullah b. 'Amr that the Messenger of Allaah (sallAllaahu alayhi wa sallam) said: A troop of soldiers who fight in tile way of Allaah and get their share of the booty receive in advance two-thirds of their reward in the Hereafter and only one-third will remain (to their credit). If they do not receive any booty, they will get their full reward.