During the reign of Joseon's King Injo, a carpenter was employed to build Naesosa Temple's Main Buddha Hall. However, for three consecutive years all he did was carve rectangular wooden pillows, resembling wooden bricks. One day a child monk hid one of the pillows. Eventually the carpenter finished carving the wooden pillows and began to build the Dharma hall by mixing and matching the pillows. Because one wooden pillow was missing, the carpenter blamed himself for being careless and insincere. Then, the child returned the wooden pillow he had hidden, but the carpenter didn't use it because he thought it was contaminated. He completed the construction of the building even though one pillow was missing. That's why even now the Main Buddha Hall is missing one wooden piece among its brackets.