Companions of the Prophet
حَدَّثَنِي عُبَيْدُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ هِشَامٍ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم لَمَّا كَانَ فِي مَرَضِهِ، جَعَلَ يَدُورُ فِي نِسَائِهِ وَيَقُولُ " أَيْنَ أَنَا غَدًا أَيْنَ أَنَا غَدًا ". حِرْصًا عَلَى بَيْتِ عَائِشَةَ، قَالَتْ عَائِشَةُ فَلَمَّا كَانَ يَوْمِي سَكَنَ.Narrated Hisham's father:When Allah's Messenger (ﷺ) was in his fatal illness, he started visiting his wives and saying, "Where will I be tomorrow?" He was anxious to be in `Aisha's home. `Aisha said, "So when it was my day, the Prophet became silent (no longer asked the question)
From Sahih al-Bukhari, whose reports the scholars accept as authentic.