It is narrated from Sayyiduna Ali (may Allah be pleased with him) that when the illness of the Prophet (peace and blessings be upon him) became severe, he said: "O Ali! Bring me a piece of paper so that I may write something by which my Ummah will be saved from going astray." Sayyiduna Ali (may Allah be pleased with him) says that I feared that before I could bring the paper, the Prophet (peace and blessings be upon him) might pass away, so I said: I will remember it myself. At that time, the Prophet's (peace and blessings be upon him) head was between my arms. The Prophet (peace and blessings be upon him) advised regarding prayer, zakat, and treating slaves well, and while saying this, he passed away. And the Prophet (peace and blessings be upon him) instructed to say «لَا إِلٰهَ إِلَّا اللهُ وَأَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُوْلُهُ» and said: "Whoever bears witness to both of these, the fire of Hell is forbidden for him."

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "Accept the invitation of the one who invites you, and do not return a gift, and do not harm the Muslims."

It is narrated from Sayyiduna Ali (may Allah be pleased with him), he said: The last words of the Prophet (peace and blessings of Allah be upon him) were: "Be steadfast in prayer, guard the prayer, and fear Allah regarding your slaves."