'Certain' in the Bible

And there were certain men who were unclean because of a dead body, so that they were not able to keep the Passover on that day; and they came before Moses and before Aaron on that day:

And came before Moses, with certain of the children of Israel, two hundred and fifty chiefs of the people, men of good name who had a place in the meeting of the people.

But if you do not do this, then you are sinners against the Lord; and you may be certain that your sin will have its reward.

Then let certain towns be marked out as safe places to which anyone who takes the life of another in error may go in flight.