Hadith 1746
Abu Barzah (May Allah be pleased with him) said:
عن أبي برزة رضي الله عنه أن رسول الله صلى الله عليه وسلم كان يكره النوم قبل العشاء والحديث بعدها. ((متفق عليه)).
The Messenger of Allah (ﷺ) disliked going to bed before the 'Isha' (night) prayer and indulging in conversation after it." [Al-Bukhari and Muslim].
In plain words
The Prophet disliked two habits around the night prayer: dozing off before praying Isha, and staying up in pointless chatter afterward. The lesson is to pray on time and let the night settle into rest.
Reference : Riyad as-Salihin 1746 In-book reference : Book 17, Hadith 236