Upper left-hand quadrant: Moses held out his arm toward the sky and thick darkness descended upon all the land of Egypt for three days. Exod. 10:22

Upper right-hand quadrant: One the one was written, 'Honor your father and your mother,' and opposite it: 'You shall not covet your neighbor's wife.' Mekhilta According to Rabbi Ishmael. Bahodesh Ch. 8.

Lower left-hand quadrant: After R. Hutzpit was slain, they brought out R. Hanina ben Hakinai for execution. The Ten Martyrs

Lower right-hand quadrant: A woman once came to the Magid of Kozhnitz and was weeping because of her husband who claimed that he hated her and that she was loathsome in his eyes. S.Y. Agnon, Atem Re'item, p. 98.