Letter to the Philippians 2:5-11
Was psaul reciting a (military) hymn they already knew? Maybe the military-heavy community had adapted an oath or cadence they’d known as soldiers.
oaths to caesar often involved, let me die first (give him long life).
https://www.jstor.org/stable/41531205
https://www.blueletterbible.org/comm/charles_hb/articles/devotional/the-hymn-of-christ.cfm
https://www.logos.com/grow/exploring-the-christ-hymn-humility-in-philippians/
With christ, he dies first, he puts us ahead of himself. humbles himself.