Amr bin Abi Qurrah (may Allah have mercy on him) says that a letter from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) came to us. He (may Allah be pleased with him) had written: "Indeed, there are some people who take a share of this wealth on the basis that they will wage jihad in the path of Allah, then they go against this and do not wage jihad. So whoever among them does this, we have more right to that wealth, until we recover from him the wealth he took." Abu Ishaq (may Allah have mercy on him) says: I got up and went to Usayr bin Amr and said: "What is your opinion of this hadith which Amr bin Abi Qurrah narrated to me?" And I narrated that hadith to Usayr. He (may Allah have mercy on him) said: "He told the truth; he brought the letter of Sayyiduna Umar (may Allah be pleased with him)."