It is narrated from Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) that in his military expeditions the Prophet (peace and blessings be upon him) used to give extra rewards (nafl) from the spoils of war (in addition to the fixed shares).
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abd al-Aziz bin Ubaydullah except Isma'il bin Ayyash."