“Whatever is done well enough is done quickly enough.”
Sat celeriter fieri, quidquid fiat satis bene.
Augustus (-63–14 BC) founder of Julio-Claudian dynasty and first emperor of the Roman Empire
In Suetonius, Lives of the Twelve Caesars, II., 25.
Cf. Shakespeare, Macbeth I. vii, "If it were done when 'tis done, then 'twere well it were done quickly".