It is narrated from Sayyiduna Habib bin Maslamah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) gave an additional reward of one-third after the khums.
Hadith Takhrijاس روایت کی سند حسن ہے۔ دیکھئے: [أبوداؤد 2748] ، [ابن ماجه 2851] ، [ابن حبان 4835] ، [موارد الظمآن 1672، وغيرهم]
Brief Explanation
(Commentary on Hadith 2518)
Here, two issues are worthy of consideration. First, whether the additional or surplus portion or reward will be given from the spoils of war (mal-e-ghanīmah) itself or from the khums (one-fifth portion)? The hadith does not specify this. Furthermore, according to this hadith, this reward or additional portion will be given after the khums has been taken out.