'Oneself' in the Bible

For the bed is too short to stretch oneself on, and the covering too narrow when he would wrap himself in it.

but if I delay, in order that thou mayest know how one ought to conduct oneself in God's house, which is the assembly of the living God, the pillar and base of the truth.

Pure and undefiled religion before God and the Father is this: to visit orphans and widows in their affliction, to keep oneself unspotted from the world.