'Certain' in the Bible

Let the king give authority to certain men in all the divisions of his kingdom, to get together all the fair young virgins and send them to Shushan, the king's town, to the women's house, under the care of Hegai, the king's servant, the keeper of the women: and let the things needed for making them clean be given to them;

Now there was a certain Jew in Shushan named Mordecai, the son of Jair, the son of Shimei, the son of Kish, a Benjamite;

And Haman said to King Ahasuerus, There is a certain nation living here and there in small groups among the people in all the divisions of your kingdom; their laws are different from those of any other nation, and they do not keep the king's laws: for this reason it is not right for the king to let them be.