Bible Dictionary · C
Cheek
Smiting on the cheek was accounted a grievous injury and insult (Job 16:10; Lam 3:30; Mic 5:1). The admonition (Luke 6:29), “Unto him that smiteth thee on the one cheek offer also the other,” means simply, “Resist not evil” (Matt 5:39; 1 Pet 2:19–23). Ps 3:7 = that God had deprived his enemies of the power of doing him injury.
From Easton’s Bible Dictionary (1897), by Matthew George Easton.