Macrobius, Saturnalia 1.7.26
“The people of Cyrene, when they make a sacrifice to him, are crowned with ripe figs and send each other cakes, because they think that Saturn discovered honey and the fruits of the earth. The Romans call him Mr. Manure (Sterculium) because he first granted fertility to the fields with shit (stercus).”
Cyrenenses etiam, cum rem divinam ei faciunt, ficis recentibus coronantur placentasque mutuo missitant, mellis et fructuum repertorem Saturnum aestimantes. Hunc Romani etiam Sterculium vocant, quod primus stercore fecunditatem agris conparaverit.
adeste fideles, laeti triumphantes, quod laetari valet stercorare