1 Samuel 13:21

21The price was two-thirds of a shekel13:21 That is, about 1/4 ounce or about 8 grams for sharpening plow points and mattocks, and a third of a shekel13:21 That is, about 1/8 ounce or about 4 grams for sharpening forks and axes and for repointing goads.