Verses with the word benefit in the Old Testament (2 verses):

2 Chronicles 32:25
But Hezekiah rendered not again according to the benefit done unto him; for his heart was lifted up: therefore there was wrath upon him, and upon Judah and Jerusalem.

Jeremiah 18:10
If it do evil in my sight, that it obey not my voice, then I will repent of the good, wherewith I said I would benefit them.