'Sustenance' in the Bible

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

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 custody, and provided them with sustenance, but didn't go in to them. So they were shut up to the day of their death, living in widowhood.