I am displeased when sometimes even the worthy Homer nods

[Indignor quandoque bonus dormitat Homerus]

Horace (65-8 BC) Roman poet, satirist, soldier, politician [Quintus Horatius Flaccus]

Ars Poetica, l. 359 (c. 18 BC)

Source of the expression, "Even Homer nods" (i.e., nobody one is perfect, even the wisest make mistakes).