Mishkat al-Masabih 4062
He told that one of the arguments put forward by 'Umar was that he said God’s Messenger received three things exclusively to himself:
the B. an-Nadir, Khaibar and Fadak.1 The B. an-Nadir property was kept wholly for his own purposes,2 Fadak for travellers, and Khaibar was divided by God’s Messenger into three sections, two for the Muslims and one as a contribution for his family. If anything remained after making the contribution to his family, he divided it among the poor Emigrants. 

    1. Fadak was near Khaibar. It capitulated without fighting.
    2. This would include, besides personal needs, the cost of entertaining guests, providing weapons and animals, etc.

Abu Dawud transmitted it.
وَعنهُ قَالَ: كانَ فِيمَا احتجَّ فيهِ عُمَرُ أَنْ قَالَ: كَانَتْ لِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثَلَاثُ صَفَايَا بَنُو النَّضِيرِ وخيبرُ وفَدَكُ فَأَمَّا بَنُو النَّضِيرِ فَكَانَتْ حَبْسًا لِنَوَائِبِهِ وَأَمَّا فَدَكُ فَكَانَتْ حَبْسًا لِأَبْنَاءِ السَّبِيلِ وَأَمَّا خَيْبَرُ فَجَزَّأَهَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثَلَاثَةٌ أَجزَاء: جزأين بينَ المسلمينَ وجزءً نَفَقَةً لِأَهْلِهِ فَمَا فَضُلَ عَنْ نَفَقَةِ أَهْلِهِ جَعَلَهُ بَيْنَ فُقَرَاءِ الْمُهَاجِرِينَ. رَوَاهُ أَبُو دَاوُدَ