For the days will come upon you when your enemies will build a dirt wall around you, surrounding you, and hemming you in on every side.

"Simon, Simon [i.e., Peter], Satan has earnestly requested the right to sift you like wheat. [Note: Grain was sifted by using a sieve-like device in which grain and particles of dirt and straw were shaken together, allowing the grain to fall through while the dirt and straw remained. This was an allusion to the agitating trials Peter was soon to endure, and survive].