Respectfully Quoted: A Dictionary of Quotations. 1989.
Plutarch (46?c. 120)
Paulus Aemilius, on taking command of the forces in Macedonia, and finding them talkative and impertinently busy, as though they were all commanders, issued out his orders that they should have only ready hands and keen swords, and leave the rest to him.
PLUTARCH, Plutarchs Lives, trans. John Dryden, rev. A. H. Clough, life of Galba, vol. 5, p. 456 (1859).