Sunan an-Nasa'i, Hadith 3825 ⓘ
'Abdullah bin Ka'b bin Malik said: "I heard Ka'b bin Malik narrating his Hadith about when he stayed behind and did not join the Messenger of Allah on the campaign to Tabuk. (he said) I said: 'As part of my repentance I want to give my wealth in charity for Allah and His Messenger.' The Messenger of Allah said: 'Keep some of your wealth for yourself; that is better for you.' I said: 'I will keep for myself my share that is in Khaibar.'"
أَخْبَرَنَا يُوسُفُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا حَجَّاجُ بْنُ مُحَمَّدٍ، قَالَ حَدَّثَنَا لَيْثُ بْنُ سَعْدٍ، قَالَ حَدَّثَنِي عُقَيْلٌ، عَنِ ابْنِ شِهَابٍ، قَالَ حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ عَبْدِ اللَّهِ بْنِ كَعْبٍ، أَنَّ عَبْدَ اللَّهِ بْنَ كَعْبِ بْنِ مَالِكٍ، قَالَ سَمِعْتُ كَعْبَ بْنَ مَالِكٍ، يُحَدِّثُ حَدِيثَهُ حِينَ تَخَلَّفَ عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي غَزْوَةِ تَبُوكَ قُلْتُ يَا رَسُولَ اللَّهِ إِنَّ مِنْ تَوْبَتِي أَنْ أَنْخَلِعَ مِنْ مَالِي صَدَقَةً إِلَى اللَّهِ وَإِلَى رَسُولِهِ . فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَمْسِكْ عَلَيْكَ مَالَكَ فَهُوَ خَيْرٌ لَكَ " . قُلْتُ فَإِنِّي أُمْسِكُ عَلَىَّ سَهْمِي الَّذِي بِخَيْبَرَ .
also referenced under: Book 35, Hadith 65 (In-Book) & Volume 4, Book 35, Hadith 3856 (DarusSalam)