Hieroglyphics of Horapollo: Book II.: XXXI. What They Den...
Hieroglyphics of Horapollo, tr. Alexander Turner Cory, [1840]
When they would signify that the whole of a parent's substance has been left to the sons, they depict a SWALLOW. For she rolls herself in the mud, and builds a nest for her young, when she is herself about to die.