'Steadfastly' in the Bible

But the sovereign Lord helps me, so I am not humiliated. For that reason I am steadfastly resolved; I know I will not be put to shame.

I am also aware that you have persisted steadfastly, endured much for the sake of my name, and have not grown weary.

Because you have kept my admonition to endure steadfastly, I will also keep you from the hour of testing that is about to come on the whole world to test those who live on the earth.