question #3 Sahih Muslim 937, Book 11, Hadith 43 : What is the significance of wailing in the context of pre-Islamic and Islamic practices?

When this verse was revealed:” When believing women came to thee giving thee a pledge that they will not associate aught with Allah, and will not disobey thee in good” (lx. 12), she (Umm Atiyya) said: In (this pledge) was also included wailing. I said: Messenger of Allah, except members of such a tribe who helped me (in lamentation) during pre-Islamic days, there is left no alternative for me, but that I should also help them. Upon this the Messenger of Allah (ﷺ) said: (Yes) but only in case of the members of such a tribe.