Quieta non movere
Defined in 3 dictionaries — Cyclopedic (1922), Ballentine's (1916), Black's (1910)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
Not to unsettle things which are established. 28 Barb. (N. Y.) 9, 22, QUIETARE (Law Lat.) To quit, acquit, discharge, or save harmless. A formal word in old deeds of donation and other conveyances. Cowell.
Ballentine's Law Dictionary
James A. Ballentine · 1916
Not to disturb that which is quiescent. See 28 Barb. (N. Y.) 9.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Not to unsettle things which are established. Green v. Hudson River R. Co., 28 Barb. (N. Y.) 9, 22.