Jami` at-Tirmidhi 2118
جامع الترمذي#2118SahihIbn 'Umar narrated that the Messenger of Allah (S.A.W) said:"It is not right for a Muslim man to spend two nights, having what he would will, without having his will written with him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 30:3