Mark 13:19

θλίψις. See on Mark 4:17. The word is appropriate here as indicating the pressure of the siege; but there is no need to expand the meaning into “one prolonged tribulation.” As often in Mk, the sentence is quite intelligible, but is rather awkwardly expressed; tribulation such as there has not been such. Blass 50. 2, 4. Josephus (Preface to B.J. 4) says that in his estimate the calamities of the Jews exceeded those of all mankind from the beginning of the world. Cf. Exodus 9:18; Deuteronomy 4:32.

οὐ μὴ γένηται. And assuredly never shall be; see on Mark 13:2. The Lord looks forward into the limitless future. Cf. Daniel 12:1; Jeremiah 30:7; 1Ma 9:27 : Assumption of Moses viii. 1. These current phrases look to the past, but Christ includes the ages to come.