How do Arabs say bye?

Hello there, I'm curious to know about cultural nuances in different parts of the world. Specifically, I'm wondering about how Arabs typically say goodbye. Is there a universal phrase or greeting that they use, or does it vary from country to country within the Arab world? Also, are there any cultural considerations or nuances I should be aware of when bidding farewell to an Arab friend or acquaintance? Thanks in advance for shedding some light on this!