'Field' in the Bible

And he who gives seed for putting into the field and bread for food, will take care of the growth of your seed, at the same time increasing the fruits of your righteousness;

We will not boast about what cannot be evaluated. Instead, we will stay within the field that God assigned us, so as to reach even you.

We do not go beyond our proper limit, boasting in the work of other men, but we have the hope that as your faith [in Christ and His divine power] continues to grow, our field among you may be greatly expanded [but still within the limits of our commission],

Even though I may be untrained as an orator, I am not so in the field of knowledge. We have made this clear to all of you in every possible way.