Which repeated structure links verses 39 and 40?

ʿAntarah ibn Shaddād: She-Camel, Conduct, Generosity and Martial Boasting (verses 31–42)

• Kaʾannamā / kamā
• Fa-idhā / wa-idhā
• Hal / alā
• Laʿamruka / wa-llāh