It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) would sometimes give some of the detachments more, compared to the whole army, and the khumus (one-fifth) was obligatory on all the property.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12806
Sayyiduna Habib bin Maslamah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) used to give a third of the wealth after the khumus. In the narration of al-Zubayri: The Messenger of Allah (peace and blessings be upon him) used to give a third, I think after the khumus, and then he would give out the rest as well.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12807
Habib bin Maslamah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) used to give a quarter after the khumus; I think he also said: and a third after the khumus when he returned. In the narration of Abdullah bin Salih (may Allah have mercy on him): When he (peace and blessings be upon him) set out on a military expedition he would give a quarter after the khumus, and when he returned he would give a third after the khumus.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12808
Abu al-Juwayriyah (may Allah have mercy on him) said: During the rule of Mu'awiyah (may Allah be pleased with him), I found a green jar in the land of the enemy. Our commander was a man from among the Companions of the Messenger of Allah (peace and blessings be upon him), from the tribe of Banu Sulaym, called Ma'n bin Yazid (may Allah be pleased with him). I brought it to him, and he divided it among the people and gave me the same as he gave each of them. Then he said: "Had I not heard from the Messenger of Allah (peace and blessings be upon him), and seen him do it, that he (peace and blessings be upon him) said: 'There is no nafl (extra award) except after the khumus,' I would have given you (more)." And he began to offer me some of his own share. I refused and said: "I am not more entitled to it than you."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12809