"I heard the Messenger of Allah say: 'Do not let the Bedouin make you change the name of your prayer. It is the 'Isha', and they bring their camels in and milk them at nightfall.'" (Using translation from Ibn Mājah 704)
قَالَ رَسُولُ اللهِ ﷺ لَا يَغْلِبَنَّكُمُ الْأَعْرَابُ عَلَى اسْمِ صَلَاتِكُمْ إِنَّهُمْ يُعْتِمُونَ عَلَى الْإِبِلِ إِنَّهَا صَلَاةُ الْعِشَاءِ