'Necessity' in the Bible

at this present time your surplus [over necessities] is going to supply their need, so that [at some other time] their surplus may be given to supply your need, that there may be equality;

Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity: for God loveth a cheerful giver.

Now I have become foolish; you have forced me [by questioning my apostleship]. Actually I should have been commended by you [instead of being treated disdainfully], for I was not inferior to those super-apostles, even if I am nobody.