A.T. Robertson Commentary Luke 17:23

"And they shall say to you, Lo, there! Lo, here! go not away, nor follow after [them]:" — Luke 17:23 (ASV)

Go not away nor follow after them (μη απελθητε μηδε διωξητε). Westcott and Hort bracket απελθητε μηδε. Note aorist subjunctive with μη in prohibition, ingressive aorist. Do not rush after those who set times and places for the second advent. The Messiah was already present in the first advent (verse 21) though the Pharisees did not know it.