One of the most challenging examples of how the New Testament uses the Old Testament is 1 Cor 9:9-10. Not a few notable scholars have deemed this text as a case of non-contextual use of the OT, some even saying that Paul is allegorizing the OT here. The text from 1 Cor 9:8-11 reads:
I am not speaking these things according to human judgment, am I? Or does not the Law also say these things? For it is written in the Law of Moses, “You shall not muzzle the ox while he is threshing.” God is not concerned about oxen, is He? Or is He speaking altogether for our sake? Yes, for our sake it was written, because the plowman ought to plow in hope, and the thresher to thresh in hope of sharing the crops. If we sowed spiritual things in you, is it too much if we reap material things from you?
The preceding context of this passage indicates that Paul is asserting his rights and those of others to be paid for their efforts in the cause of the Gospel. Just as soldiers have a right to be supported and vineyard planters have a right to eat from vineyards (see 1 Cor 9:7), so too, those who “sowed spiritual things” have a right to “reap material things” (9:11).