Messenger of Allah said: "If it were not that it would be a hardship on my Ummah, then I would have ordered you to delay Isha until the third of the night, or its half."  

قَالَ النَّبِيُّ ﷺ لَوْلاَ أَنْ أَشُقَّ عَلَى أُمَّتِي لأَمَرْتُهُمْ أَنْ يُؤَخِّرُوا الْعِشَاءَ إِلَى ثُلُثِ اللَّيْلِ أَوْ نِصْفِهِ قَالَ وَفِي الْبَابِ عَنْ جَابِرِ بْنِ سَمُرَةَ وَجَابِرِ بْنِ عَبْدِ اللَّهِ وَأَبِي بَرْزَةَ وَابْنِ عَبَّاسٍ وَأَبِي سَعِيدٍ الْخُدْرِيِّ وَزَيْدِ بْنِ خَالِدٍ وَابْنِ عُمَرَ