"The Messenger of Allah ﷺ said: 'Do not let the Bedouin make you change the name of this prayer of yours, for they delay the prayer until it is very dark because of their preoccupation with camels and milking them. Verily, it is 'Isha'.'" (Using translation from Nasāʾī 541)  

قَالَ رَسُولُ اللهِ ﷺ «لَا تَغْلِبَنَّكُمُ الْأَعْرَابُ عَلَى اسْمِ صَلَاتِكُمْ هَذِهِ فَإِنَّهُمْ يُعْتِمُونَ عَلَى الْإِبِلِ وَإِنَّهَا الْعِشَاءُ»  

"I heard the Messenger of Allah ﷺ say on the Minbar: 'Do not let the Bedouin make you change the name of your prayer; verily, it is 'Isha'.'" (Using translation from Nasāʾī 542)  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ عَلَى الْمِنْبَرِ «لَا تَغْلِبَنَّكُمُ الْأَعْرَابُ عَلَى اسْمِ صَلَاتِكُمْ أَلَا إِنَّهَا الْعِشَاءُ»