Hieroglyphics of Horapollo: Book I: XXVIII. How Dumbness
Hieroglyphics of Horapollo, tr. Alexander Turner Cory, [1840]
To denote dumbness, they depict the number 1095, which is the number of days in the space of three years, the year consisting of 365 days, within which time, if a child does not speak, it chews that it has an impediment in its tongue.