A.T. Robertson Commentary Luke 21:9

"And when ye shall hear of wars and tumults, be not terrified: for these things must needs come to pass first; but the end is not immediately." — Luke 21:9 (ASV)

Be not terrified (μη πτοηθητε). First aorist passive subjunctive with μη from πτοεω an old verb to terrify, from πτοα, terror. In the N.T. only here and Lu 24:37.

First (Πρωτον). It is so easy to forget this and to insist that the end is "immediately" in spite of Christ's explicit denial here. See Mt 24:4-42; Mr 13:1-37 for discussion of details for Lu 21:8-36, the great eschatological discourse of Jesus