What is Benedicta Est Expositio Quando Res Redimitur A Destructione?

Legal Definition
4 Coke, 26. Blessed ig the exposition when anything is saved from destruction. It is a laudable interpretation which gives effect to the instrument, and does nbt allow its purpose to be frustrated.
-- Black's Law Dictionary
Legal Definition
Blessed is that interpretation which prevents destruction.
-- Ballentine's Law Dictionary