'Require' in the Bible

For the Jews require a sign, and the Greeks seek after wisdom:

For what business is it of mine to judge outsiders (non-believers)? Do you not judge those who are within the church [to protect the church as the situation requires]?

But if any man think that he behaveth himself uncomely toward his virgin, if she pass the flower of her age, and need so require, let him do what he will, he sinneth not: let them marry.

while our more presentable parts do not require it. But God has combined the [whole] body, giving greater honor to that part which lacks it,