The “large shield” (Heb., tsin·nahʹ) was carried by the heavily armed infantry (2Ch 14:8) and sometimes by a shield bearer. (1Sa 17:7, 41) It was either oval or else rectangular like a door. Apparently a similar “large shield” is designated at Ephesians 6:16 by the Greek word thy·re·osʹ (from thyʹra, meaning “door”). The tsin·nahʹ was large enough to cover the entire body. (Ps 5:12) It was on occasion used to set up solid-front battle lines with lances protruding. The large shield is sometimes mentioned with the lance or spear as a form of reference to weapons in general.​—1Ch 12:8, 34; 2Ch 11:12.

A prominent part of the spiritual armor is “the large shield of faith.” Like a large shield covering most of the body, faith in Jehovah God and his ability to fulfill his promises will enable a Christian to “quench all the wicked one’s burning missiles.” (Eph 6:16; compare Ps 91:4.) Faith will help a Christian withstand attacks by wicked spirits, resist temptations to immorality, shun materialistic desires, and not give in to fear, doubt, or excessive grief.​—Ge 39:7-12; Heb 11:15; 13:6; Jas 1:6; 1Th 4:13.