It reminds me of a part of Unstoppable of Sia

I put my armor on, show you how strong I am
I put my armor on, I'll show you that I am
I'm unstoppable
I'm a Porsche with no brakes
I'm invincible
Yeah, I win every single game
I'm so powerful
I don't need batteries to play
I'm so confident
Yeah, I'm unstoppable today

I)Now we're in this Army, fighting for Jesus
Waving his blood stained banner
Letting the devil know who's side were on
Now the battle ain't been easy
But it will be worth all of our struggles
After we our mansion in close to the Father's throne

Cho) And I won't lay down my armour in the heat of the battle
I'll keep on fighting with the shield of faith all around
I've got on my breast plate of righteousness
Helmet of salvation on his word I'll stand
In the heat of the battle. I won't lay my armour down.

II) Be strong in the Lord
Put on the whole armour
That you may be able to stand
The firey darts of the wicked
You better get your feet shod with the preparation of the gospel of peace. You keep on fighting with the sword of the spirit
The word of God

I won't lay down my armor in the heat of the battle