It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that he said: "Whoever would like to read the testament of the Messenger of Allah (peace and blessings be upon him), let him read these verses: 'Say: Come, I will recite what your Lord has forbidden to you' up to the saying of Allah Almighty: 'This He has enjoined upon you that you may become righteous.'"
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Imam al-Sha'bi (may Allah have mercy on him) except Dawud (may Allah have mercy on him), and Muhammad bin Fudayl (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 1186
Hadith Takhrij«أخرجه الترمذي فى «جامعه» برقم: 3070، والطبراني فى «الكبير» برقم: 10060»