'Royal' in the Bible

And upon a set day Herod arrayed himself in royal apparel, and sat on the throne, and made an oration unto them.

Howbeit if ye fulfil the royal law, according to the scripture, Thou shalt love thy neighbor as thyself, ye do well:

But ye are a elect race, a royal priesthood, a holy nation, a people for God's own possession, that ye may show forth the excellencies of him who called you out of darkness into his marvellous light: