'Certain' in the Bible

Certain base fellows are gone out from the midst of you, and have drawn away the inhabitants of their city, saying, "Let us go and serve other gods," which you have not known;

then you shall inquire, and make search, and ask diligently; and, behold, if it be truth, and the thing certain, that such abomination is done in the midst of you,

and it be told you, and you have heard of it, then you shall inquire diligently; and behold, if it be true, and the thing certain, that such abomination is done in Israel,