Sulla (16.5-16.6)

But Sulla, though chafing and fretting while cities were destroyed before his eyes, would not suffer his soldiers to be idle, but led them out and forced them to dig ditches and divert the Cephisus from its channel, giving no man a respite, and showing himself an inexorable chastiser of those who were remiss, in order that they might be worn out at their tasks and induced by their hardships to welcome danger. And so it fell out.

For on the third day of their drudgery, as Sulla passed by, they begged and clamoured to be led against the enemy. But Sulla said their words showed not a willingness to fight, but an unwillingness to labour; if, however, they were really disposed to fight, then he bade them take their arms and go at once yonder, pointing them to what had formerly been the acropolis of Parapotamii.