'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.'"