Dionysius Cato, Distichs 4.49
Cato wrote a collection of distichs purveying assorted bits of wisdom. The final poem of the set explains why he chose this form:
miraris versus nudis me scribere verbis?
hoc brevitas fecit, sensu uno iungere binos.
Are you surprised that I write verses with unadorned words? It’s brevity that makes me join them, two at a time, in a single meaning.