question #3 Sahih Muslim 647b, Book 5, Hadith 296 : How does the timing of the ‘Isha’ prayer reflect on the daily routine and discipline in Islam?

I heard Abu Barza saying that the Messenger of Allah (ﷺ) did not mind some delay in the ‘Isha’ prayer even up to midnight and he did not like sleeping before (observing it) and talking after it. Shu’ba said: I again met him (Sayyar b. Salama) for the second time and he said: Even up to the third (part) of the night.