Sahih al-Bukhari Book 9, Hadith 41
"One night Allah's Messenger (ﷺ) led us in the `Isha' prayer and that is the one called Al-`Atma by the
people. After the completion of the prayer, he faced us and said, "Do you know the importance of this
night? Nobody present on the surface of the earth tonight will be living after one hundred years from
this night." (See Hadith No. 575).
The Prophet (ﷺ) said, "Do not be influenced by bedouins regarding the name of your Maghrib prayer which is called `Isha' by them."
We asked Jabir bin `Abdullah about the prayers of the Prophet (ﷺ) . He said, "He used to pray Zuhr prayer at midday, the `Asr when the sun was still hot, and the Maghrib after sunset (at its stated time). The `Isha was offered early if the people gathered, and used to be delayed if their number was less; and the morning prayer was offered when it was still dark. "