ʿĀʾishah (may Allah be pleased with her) said, “The Messenger of Allah ﷺ never went to sleep before the ʿIshāʾ prayer, nor did he engage in conversation after it.” (Ibn Mājah 238; al-Ṭiyālisī 201; Aḥmad 6/264) This comes through the route of ʿAbd-Allah ibn ʿAbd-al-Raḥmān ibn Yaʿlā al-Ṭāʾifī from ʿAbd-al-Raḥmān ibn al-Qāsim, from his father, from her. Its chain is ḥasan, and its narrators are those used by Muslim. The editor of al-Zawāʾid judged it ṣaḥīḥ.
Ibn Naṣr records another chain: “Mahmūd ibn Ādam narrated to us; Yaḥyā ibn Sulaym narrated to us; Hishām ibn ʿUrwah narrated that he heard his father say: ‘After the last ʿIshāʾ I left (the mosque) and heard my aunt ʿĀʾishah’s voice while we were in a room, a ceiling separating us. She said, ‘O ʿUrwah— or little ʿUrwah—what is this late-night talk? I never saw the Messenger of Allah ﷺ sleep before this prayer or converse after it; he was either sleeping in safety or standing in prayer and winning reward.’” This isnād is also good, and its transmitters are those found in al-Bukhārī.
Ibn Masʿūd said, “The Messenger of Allah ﷺ (1) forbade us from engaging in late-night conversation after the ʿIshāʾ,” meaning that he rebuked us for it.