The Messenger of Allah said: "A Muslim man has no right to spend two nights while he has something to will, except while his will is recorded with him."
Jami` at-Tirmidhi Book 10, Hadith 10
← Previous Hadith "Thabit Al-Bunani and I entered upon Anas bin Malik, and Thabit said: 'O Abu Hamzah! I am suffering from an illness. So Anas said: 'Shall I not recite the Ruqyah of the Messenger of Allah over you?' He said: 'Why, yes.' He said: 'O Allah! Lord of mankind, removed the harm, and cure (him). Indeed You are the One Who cures, there is none who cures except you, a cure that leaves no disease.'"

Jami` at-Tirmidhi Book 10, Hadith 9 Next Hadith → "The Messenger of Allah came to visit me while I was sick. He said: 'Do you have a will?' I said: 'Yes.' He said: 'For how much?' I said: 'All of my wealth, for the cause of Allah.' He said: 'What did you leave for your children?'" He (Sa'd) said: "They are rich in goodness.' He said: 'Will a tenth.'" He (Sa'd) said: "He (pbuh) continued decreasing it until he said: 'Will a third, and a third is too great.'" (One of the narrators:) Abdur-Rahman said: "We considered it recommended that it be less than a third, since the Messenger of Allah said: 'And a third is too great.'"

Jami` at-Tirmidhi Book 10, Hadith 11