'Whereto' in the Bible

Yea, whereto might the strength of their hands profit me, in whom old age was perished?

So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.

Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing.