'Necessity' in the Bible

But he that standeth stedfast in his heart, having no necessity, but hath power as touching in his own heart, to keep his own virgin daughter , shall do well.

For if I preach the gospel, I have nothing to glory of; for necessity is laid upon me; for woe is unto me, if I preach not the gospel.

Let each man do according as he hath purposed in his heart: not grudgingly, or of necessity: for God loveth a cheerful giver.

but without thy mind I would do nothing; that thy goodness should not be as of necessity, but of free will.

For the priesthood being changed, there is made of necessity a change also of the law.

For where a testament is, there must of necessity be the death of him that made it.