How should historical assertions in this passage be approached?

al-Ḥārith ibn Ḥillizah: Ḥujr, Royal Kinship and the Dhū al-Majāz Covenant (verses 56–67)

• Treat them as the opponent’s own narrative
• Read them as claims within tribal poetic advocacy
• Treat every claim as verified history
• Convert all lines into modern legal doctrine