A.T. Robertson Commentary Luke 21:22

"For these are days of vengeance, that all things which are written may be fulfilled." — Luke 21:22 (ASV)

That may be fulfilled (του πλησθηνα). Articular infinitive passive to express purpose with accusative of general reference. The O.T. has many such warnings (Hosea 9:7; Deuteronomy 28:49–57, etc.).