Jami` at-Tirmidhi 3756
جامع الترمذي#3756SahihNarrated 'Aishah:"The Messenger of Allah (ﷺ) did not sleep one night upon arriving in Al-Madinah. So he said: 'If only a righteous man would guard me tonight.'" She said: "So we were like that, when we heard the clanging of weapons. He said: 'Who is this?' So he said: 'Sa'd bin Abi Waqqas.' So the Messenger of Allah (ﷺ) said: 'What has brought you?' Sa'd said: 'Fear for the Messenger of Allah (ﷺ) came upon me, so I came to protect him.' So the Messenger of Allah (ﷺ) supplicated for him, then slept
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: 49:153