Sahih Muslim Book - 5, Hadith - 1446

وَحَدَّثَنِى زُهَيْرُ بْنُ حَرْبٍ وَإِسْحَاقُ بْنُ إِبْرَاهِيمَ - قَالَ إِسْحَاقُ أَخْبَرَنَا وَقَالَ زُهَيْرٌ حَدَّثَنَا جَرِيرٌ - عَنْ مَنْصُورٍ عَنِ الْحَكَمِ عَنْ نَافِعٍ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ قَالَ مَكَثْنَا ذَاتَ لَيْلَةٍ نَنْتَظِرُ رَسُولَ اللَّهِ -صلى الله عليه وسلم- - لِصَلاَةِ الْعِشَاءِ الآخِرَةِ فَخَرَجَ إِلَيْنَا حِينَ ذَهَبَ ثُلُثُ اللَّيْلِ أَوْ بَعْدَهُ فَلاَ نَدْرِى أَشَىْءٌ شَغَلَهُ فِى أَهْلِهِ أَوْ غَيْرُ ذَلِكَ فَقَالَ حِينَ خَرَجَ « إِنَّكُمْ لَتَنْتَظِرُونَ صَلاَةً مَا يَنْتَظِرُهَا أَهْلُ دِينٍ غَيْرُكُمْ وَلَوْلاَ أَنْ يَثْقُلَ عَلَى أُمَّتِى لَصَلَّيْتُ بِهِمْ هَذِهِ السَّاعَةَ ». ثُمَّ أَمَرَ الْمُؤَذِّنَ فَأَقَامَ الصَّلاَةَ وَصَلَّى.

It was narrated that 'Abdullah bin 'Umar said: "One night we remained waiting for the Messenger of Allah (s.a.w) to pray 'Isha', and he came out to us when one-third or more of the night had passed. We did not know if some family matter had detained him or something else. When he came out, he said: 'You are waiting for a prayer for which the people of no other religion are waiting. Were it not that it would be too burdensome for my Ummah, I would have prayed it with you at this hour.' Then he told the Mu'adhadhin to call the Iqamah, and he prayed."