'Therein' in the Bible

Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:

Above when he said, Sacrifice and offering and burnt offerings and offering for sin thou wouldest not, neither hadst pleasure therein; which are offered by the law;

Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.