Read all Ahadith in the book of wills by sahih al muslim

Ibn Umar (Allah be pleased with them) reported Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) as saying: It is the duty of a Muslim who has something which is to be given as a bequest not to have it for two nights without having his will written down regarding it.

This hadith has been narrated on the authority of 'Ubaidullah with the same chain of transmitters. but with a slight variation of words.

A hadith like this have been narrated on the authority of Nafi', who based his narrations of the words of Ibn 'Umar but with a slight variation of words.

Salim reported on the authority of his father ('Abdullah b. Umar) that he (his father) had heard Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) as saying: It is not proper for a Muslim who has got something to bequeathe to spend even three nights without having his will written down with him regarding it. 'Abdullah b. 'Umar (Allah be pleased with them) said: Ever since I heard Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) say this I have not spent a night without having my will (written) along with me.

This hadith has been narrated on the authority of Zuhri with the same chain of transmitters.

Amir b. Sa'd reported on the authority of his father (Sa'd b. Abi Waqqas): Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) visited me in my illness which brought me near death in the year of Hajjat-ul-Wada' (Farewell Pilgrimage). I said: Allah's Messenger, you can well see the pain with which I am afflicted and I am a man possessing wealth, and there is none to inherit me except only one daughter. Should I give two-thirds of my property as Sadaqa? He said: No. I said: Should I give half (of my property) as Sadaqa? He said: No. He (further) said: Give one-third (in charity) and that is quite enough. To leave your heirs rich is better than to leave them poor, begging from people; that you would never incur an expense seeking therewith the pleasure of Allah, but you would be rewarded therefor, even for a morsel of food that you put in the mouth of your wife. I said: Allah's Messenger. would I survive my companions? He (the Holy Prophet) said: If you survive them, then do such a deed by means of which you seek the pleasure of Allah, but you would increase in your status (in religion) and prestige; you may survive so that people would benefit from you, and others would be harmed by you. (The Holy Prophet) further said: Allah, complete for my Companions their migration, and not cause them to turn back upon their heels. Sa'd b. Khaula is, however, unfortunate. Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) felt grief for him as he had died in Mecca.

This hadith is narrated on the authority of Zuhri with the same chain of transmitters.

Amir b. Sa'd reported from S'ad (b. Abu Waqqas): Allah's Apostle ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) visited me to inquire after my health, the rest of the hadith is the same as transmitted on the authority of Zuhri, but lie did not make mention of the words of Allah's Apostle ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) in regard to Sa'd b. Khaula except this that he said: He (the Holy Prophet) did not like death in the land from which lie had migrated.

Mus'ab b. Sa'd reported on the authority of his father. I was ailing. I sent message to Allah's Apostle ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) saying: Permit me to give away my property as I like. He refused. I (again) said: (Permit me) to give away half. He (again refused). I (again said): Then one-third. He (the Holy Prophet) observed silence after (I had asked permission to give away) one-third. He (the narrater) said: It was then that endowment of one-third became permissible.

This hadith has been narrated on the authority of Simak with the same chain of transmitters. But he did not mention: It was then that one-third became permissible.