Sahih Bukhari Volume 5, Book 62, Hadith 3776

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 By Hisham's father : When Allah's Apostle 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)."