And the Lord spoke unto Moses: “Go, get thee down” (Exod. 32:7). May our masters teach us: If a person sends his eruv by means of a deaf mute, a fool, or a child, is his eruv considered a legal one?
Thus do our masters teach us: If one sends his eruv by means of a deaf mute, a fool, or a child, his eruv is not a legal one. Shame upon the man who sends a fool as his messenger to the King, as it is said: He that sendeth a message by the hand of a fool cutteth off his own feet and drinketh damage (Prov. 26:6).