"They say that the Prophet ﷺ made a will for 'Ali,[1] but he called for a basin in which to urinate, then he went flaccid suddenly (and died), so how could he leave a will?!" The Shaikh said: Azhar (one of the narrators) is Ibn Sa'd As-Samman. [1] Meaning, appointing him as the Khalifah.
يَقُولُونَ إِنَّ النَّبِيَّ ﷺ أَوْصَى إِلَى عَلِيٍّ لَقَدْ دَعَا بِالطَّسْتِ لِيَبُولَ فِيهَا فَانْخَنَثَتْ نَفْسُهُ وَمَا أَشْعُرُ فَإِلَى مَنْ أَوْصَى قَالَ الشَّيْخُ أَزْهَرُ هُوَ ابْنُ سَعْدٍ السَّمَّانُ
"They say that the Messenger of Allah made a will concerning 'Ali, may Allah be pleased with him. But he called for a vessel in which to urinate, then he went limp without me realizing it. So to whom did he leave a will?"
يَقُولُونَ إِنَّ رَسُولَ اللَّهِ ﷺ أَوْصَى إِلَى عَلِيٍّ ؓ لَقَدْ دَعَا بِالطَّسْتِ لِيَبُولَ فِيهَا فَانْخَنَثَتْ نَفْسُهُ ﷺ وَمَا أَشْعُرُ فَإِلَى مَنْ أَوْصَى
"They say that the Messenger of Allah made a will concerning 'Ali, may Allah be pleased with him. But he called for a vessel in which to urinate, then he went limp without me realizing it. So to whom did he leave a will?" (Using translation from Nasāʾī 3624)
يَقُولُونَ إِنَّ رَسُولَ اللهِ ﷺ أَوْصَى إِلَى عَلِيٍّ لَقَدْ دَعَا بِالطَّسْتِ لِيَبُولَ فِيهَا فَانْخَنَثَتْ نَفْسُهُ ﷺ وَمَا أَشْعُرُ فَإِلَى مَنْ أَوْصَى