Matthew Poole and continuators on Ruth 2:18

18 ¶ And she took it up, and went into the city: and her mother in law saw what she had gleaned: and she brought forth, and gave to her that she had reserved, and was sufficed .

Or, that which she had left of her fulness, or after she was satisfied. She did Eat as much as she desired of what she had Gleaned, and her Mother, as I suppose, with her, and the residue she gave to her Mother, to lay up for future use.