糸(いと)を結んだ(むすんだ)蟻(あり)

When the young man consulted his mother under the floor, she smiled and said, 'That is simple. Tie a thread around the waist of an ant, put it in through one end of the hole, and smear honey on the exit at the other end. Attracted by the smell of honey, the ant will pull the thread through.'