Is it true that whoever eats while eyes are watching him eats poison?

The aforementioned hadith is false due to its absence from the books of hadith, and because it contradicts the Prophet's urging to gather for meals, and his saying: "The food of one is sufficient for two, and the food of two is sufficient for four, and the food of four is sufficient for eight," and "Gather for your food and mention the name of Allah; He will bless it for you."