'Mingle' in the Bible

from the very nations of whom the Lord said to the Israelites, “You shall not associate with them, nor shall they associate with you, for the result will be that they will turn away your hearts to follow their gods.” Yet Solomon clung to these in love.

And as you saw the iron mixed with common clay, so they will combine with one another in the seed of men; but they will not merge [for such diverse things or ideologies cannot unite], even as iron does not mix with clay.