'Grain' in the Bible

You would say, Four months from now is the time of the grain-cutting. Take a look, I say to you, at the fields; they are even now white for cutting.

He who does the cutting now has his reward; he is getting together fruit for eternal life, so that he who did the planting and he who gets in the grain may have joy together.

In this the saying is a true one, One does the planting, and another gets in the grain.

I sent you to get in grain which you had no hand in planting: other men did that work, and you take the reward.

Truly I say to you, If a seed of grain does not go into the earth and come to an end, it is still a seed and no more; but through its death it gives much fruit.