probi et legales homines

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

PROBI ET LEGALES HOMINES. Good and lawful men; persons competent in point of 
law to serve on juries. Cro. Eliz. 654, 751; Cro. Jac. 635; Mart. & Yerg. 
147; Hardin, 63; Bac. Ab. Juries, A.