"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: 'When I sat down before him I said: "O Messenger of Allah, as part of my repentance I want to give my wealth in charity to 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 my share that is in Khaibar."'" (Using translation from Nasāʾī 3824)
عَنْ رَسُولِ اللهِ ﷺ فِي غَزْوَةِ تَبُوكَ قَالَ فَلَمَّا جَلَسْتُ بَيْنَ يَدَيْهِ قُلْتُ يَا رَسُولَ اللهِ إِنَّ مِنْ تَوْبَتِي أَنْ أَنْخَلِعَ مِنْ مَالِي صَدَقَةً إِلَى اللهِ وَإِلَى رَسُولِهِ قَالَ رَسُولُ اللهِ ﷺ «أَمْسِكْ عَلَيْكَ بَعْضَ مَالِكَ فَهُوَ خَيْرٌ لَكَ» قُلْتُ فَإِنِّي أَمْسِكُ سَهْمِيَ الَّذِي بِخَيْبَرَ مُخْتَصَرٌ مِنْ حَدِيثِ التَّوْبَةِ