What is the ruling on classifying people according to their lineages, boasting about them, and writing poems that reinforce historical combat events of one tribe against another?

It is permissible to classify people according to their lineages for the purpose of knowing their genealogies and establishing kinship ties. However, it is forbidden if the intention is to boast about one's lineage and disparage others' ancestries. Writing historical poems among tribes is permissible as long as it does not involve boasting and disparaging lineages.