'Beneficial' in the Bible

So Jonathan spoke on David's behalf to his father Saul. He said to him, "The king should not sin against his servant David, for he has not sinned against you. On the contrary, his actions have been very beneficial for you.

I have seen personally what is the only beneficial and appropriate course of action for people: to eat and drink, and find enjoyment in all their hard work on earth during the few days of their life which God has given them, for this is their reward.