Dam bene se gesserit
Defined in 1 dictionary — Black's (1910)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
While he shall conduct himself well; during good behavior. Expressive of a tenure of office not dependent upon the pleasure of the appointing power, nor for a limited period, but terminable only upon the death or misconduct of the incumbent.
Defined under Dum in Black's Law Dictionary.