Refuge taken in the one attribute nothing else has
The clause at the end is the argument.
أَعُوذُ بِعِزَّتِكَ الَّذِي لاَ إِلَهَ إِلاَّ أَنْتَ، الَّذِي لاَ يَمُوتُ وَالْجِنُّ وَالإِنْسُ يَمُوتُونَ
Aʿūdhu bi-ʿizzatika-lladhī lā ilāha illā ant, alladhī lā yamūtu wa-l-jinnu wa-l-insu yamūtūn
“I seek refuge in Your might, You beside whom there is no god, who does not die, while jinn and men die.”
Where this comes from
Everything else you could take shelter behind is going to end. The sentence names the one thing that is not going to, and shelters there.
The full narration
Narrated Ibn `Abbas:The Prophet (ﷺ) used to say, "I seek refuge (with YOU) by Your 'Izzat, None has the right to be worshipped but You Who does not die while the Jinns and the human beings die
Source
Ṣaḥīḥ al-Bukhārī · 7383
Ṣaḥīḥ
- Agreed upon as authentic (al-Bukhārī / Muslim)