'Abdur-Rahman bin Ka'b bin Malik narrated that 'Abdullah bin Ka'b 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: '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."'"