Sahih Muslim 643
Sahih Muslim · Book 5: The Book of Mosques and Places of Prayer · The time of `Isha and delaying it
Jabir b. Samura reported:
وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، وَأَبُو كَامِلٍ الْجَحْدَرِيُّ قَالاَ حَدَّثَنَا أَبُو عَوَانَةَ ، عَنْ سِمَاكٍ ، عَنْ جَابِرِ بْنِ سَمُرَةَ ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّي الصَّلَوَاتِ نَحْوًا مِنْ صَلاَتِكُمْ وَكَانَ يُؤَخِّرُ الْعَتَمَةَ بَعْدَ صَلاَتِكُمْ شَيْئًا وَكَانَ يُخِفُّ الصَّلاَةَ . وَفِي رِوَايَةِ أَبِي كَامِلٍ يُخَفِّفُ .
The Messenger of Allah (ﷺ) used to observe prayers like your prayers, but he would delay the prayer after nightfall to a little after the time you observed it, and he would shorten the prayer.