Do nothing without advice; and when you have once done, repent not.
LXX
Sirach 32:19
till he have rendered to every man according to his deeds, and to the works of men according to their devices; till he have judged the cause of his people, and made them to rejoice in his mercy.
Parallel Translations
Do nothing without advice; and when thou hast once done, repent not.
Do nothing without counsel, but when you have acted, don’t regret it.