The desert Arabs may not dominate you in respect of the name of your prayer. Beware! It is al-ʿIsha, but they milk their camels when it is fairly dark.  

عَنِ النَّبِيِّ ﷺ قَالَ لاَ تَغْلِبَنَّكُمُ الأَعْرَابُ عَلَى اسْمِ صَلاَتِكُمْ أَلاَ وَإِنَّهَا الْعِشَاءُ وَلَكِنَّهُمْ يُعْتِمُونَ بِالإِبِلِ  

Salim ibn AbulJa'dah said: A man said: (Mis'ar said: I think he was from the tribe of Khuza'ah): would that I had prayed, and got comfort. The people objected to him for it. Thereupon he said: I heard the Messenger of Allah ﷺ as saying: O Bilal, call iqamah for prayer: give us comfort by it.  

مِسْعَرٌ أُرَاهُ مِنْ خُزَاعَةَ لَيْتَنِي صَلَّيْتُ فَاسْتَرَحْتُ فَكَأَنَّهُمْ عَابُوا عَلَيْهِ ذَلِكَ فَقَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ يَا بِلاَلُ أَقِمِ الصَّلاَةَ أَرِحْنَا بِهَا  

I and my father went to the house of my father-in-law from the Ansar to pay a sick visit to him. The time of prayer came. He said to someone of his relatives: O girl! bring me water for ablution so that I pray and get comfort. We objected to him for it. He said: I heard the Messenger of Allah ﷺ say: Get up, Bilal, and give us comfort by the prayer.  

انْطَلَقْتُ أَنَا وَأَبِي إِلَى صِهْرٍ لَنَا مِنَ الأَنْصَارِ نَعُودُهُ فَحَضَرَتِ الصَّلاَةُ فَقَالَ لِبَعْضِ أَهْلِهِ يَا جَارِيَةُ ائْتُونِي بِوَضُوءٍ لَعَلِّي أُصَلِّي فَأَسْتَرِيحَ قَالَ فَأَنْكَرْنَا ذَلِكَ عَلَيْهِ فَقَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ قُمْ يَا بِلاَلُ أَقِمْ فَأَرِحْنَا بِالصَّلاَةِ  

I never heard the Messenger of Allah ﷺ attributing anyone to anything except to religion.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَنْسُبُ أَحَدًا إِلاَّ إِلَى الدِّينِ