From Sahih Bukhari (Hadith 3498):
Narrated Abi Mas`ud:The Prophet (ﷺ) said, "From this side from the east, afflictions will appear. Rudeness and lack of mercy are characteristics of the rural bedouins who are busy with their camels and cows (and pay no attention to religion). Such are the tribes of Rabi`a and Mudar
Reference: Bukhari 3498