'Sustenance' in the Bible

Now Barzillai was a very aged man, even fourscore years old: and he had provided the king with sustenance while he lay at Mahanaim; for he was a very great man.

And David came to his house at Jerusalem; and the king took the ten women his concubines, whom he had left to keep the house, and put them in ward, and provided them with sustenance, but went not in unto them. So they were shut up unto the day of their death, living in widowhood.