proof armour of proof,
“armour hardened till it will abide a certain trial”
(JOHNSON)
:
“Armed in proof,”
RICHARD III., v. 3. 219
;
“in strong proof of chastity well arm'd,”
ROMEO AND JULIET, i. 1. 208
;
“lapp'd in proof,”
MACBETH, i. 2. 55.