'Separating' in the Bible

and to speak unto the priests that were in the house of Jehovah of hosts, and to the prophets, saying, Should I weep in the fifth month, separating myself, as I have done now so many years?

If therefore one shall have purified himself from these, in separating himself from them, he shall be a vessel to honour, sanctified, serviceable to the Master, prepared for every good work.