Lamentations 4:6 says Jerusalem's punishment exceeded even Sodom's, reinforcing the idea of unprecedented judgment that Mark 13:19 calls tribulation unlike any before.

Daniel 12:1 explicitly speaks of a 'time of distress such as has not happened from the beginning of nations' — matching Mark's language.

Matthew 24:21 is the parallel account, using nearly identical wording for the same unparalleled distress.

Luke 21:22-24 expands the same discourse, emphasizing the punishment and destruction of Jerusalem that fulfills these days.

Jeremiah 30:7 calls it 'a time of trouble for Jacob' with nothing like it — directly parallel to Mark's unprecedented days.

Deuteronomy 28:59 warns of extraordinary afflictions as covenant curses, providing the OT background for the unparalleled tribulation described here.

Deuteronomy 29:22-28 describes the desolation of Israel in terms of a 'great wrath' and scattering, echoing the severity of the tribulation in Mark 13:19.

Zechariah 14:2 describes the siege of Jerusalem, a key event during the unparalleled tribulation Jesus predicts.

Genesis 1:1 is the creation account that Mark 13:19 references as the beginning point for measuring the unparalleled distress.