1 Samuel 13:20. "But all the Israelites went down to the Philistines, to sharpen every man his share, and his coulter, and his axe, and his mattock."

1 Samuel 13:21. "Yet they had a file for the mattocks, and for the coulters, and for the forks, and for the axes, and to sharpen the goads."

1 Samuel 14:27. "But Jonathan heard not when his father charged the people with the oath: wherefore he put forth the end of the rod that was in his hand, and dipped it in an honeycomb, and put his hand to his mouth; and his eyes were enlightened."

Sabbath! :)