'Keep' in the Bible

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.

If indeed ye keep the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well.

For whoever shall keep the whole law and shall offend in one point, he has come under the guilt of breaking all.