It was narrated that Aswad said:
“They said in ‘Aishah’s presence that ‘Ali was appointed (by the Prophet ﷺ before he died), and she said: ‘When was he appointed? He (the Prophet ﷺ) was resting against my bosom, or in my lap, and he called for a basin, then he became limp in my lap and died, and I did not realize it. So when did he ﷺ appoint him?’”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا إِسْمَاعِيلُ ابْنُ عُلَيَّةَ، عَنِ ابْنِ عَوْنٍ، عَنْ إِبْرَاهِيمَ، عَنِ الأَسْوَدِ، قَالَ ذَكَرُوا عِنْدَ عَائِشَةَ أَنَّ عَلِيًّا كَانَ وَصِيًّا . فَقَالَتْ مَتَى أَوْصَى إِلَيْهِ فَلَقَدْ كُنْتُ مُسْنِدَتَهُ إِلَى صَدْرِي - أَوْ إِلَى حِجْرِي فَدَعَا بِطَسْتٍ فَلَقَدِ انْخَنَثَ فِي حِجْرِي فَمَاتَ وَمَا شَعَرْتُ بِهِ فَمَتَى أَوْصَى ﷺ .