ذِكْرُ الزَّجْرِ عَنْ أَنْ تُسَمَّى صَلَاةُ الْعِشَاءِ الْآخِرَةِ الْعَتَمَةَ
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. (Using translation from Abū Dāʾūd 4984)
عَنِ النَّبِيِّ ﷺ قَالَ «لَا تَغْلِبَنَّكُمُ الْأَعْرَابُ عَلَى اسْمِ صَلَاتِكُمُ الْعِشَاءِ يُسَمُّونَهَا الْعَتَمَةَ لِإِعْتَامِ الْإِبِلِ»