What did Les say is prophetic from Abraham through the Old Testament?
He said everything from Abraham all the way through the Old Testament is prophetic, continually declaring what will happen. That is prophecy. This includes chapter 24, which aligns with what Jesus will discuss concerning future events. It all speaks of what will happen, and that is prophecy.
Les explains that he has always connected everything, beginning almost with Abraham and continuing all the way up through the Old Testament. He says everything is prophetic—everything is saying what will happen, and that is prophecy. He then applies this to chapter 24, noting it is exactly what Jesus is going to talk about concerning things that will happen at some point in the future. In the surrounding context, Jesus departs from the temple complex, and His disciples point out the temple buildings. Jesus predicts that not one stone will be left upon another. Les notes that Nebuchadnezzar destroyed the temple by fire, but the Romans dismantled it rock by rock and stone by stone, even seeking gold hidden between the building blocks. This, Les says, is exactly what Jesus is talking about in prophetic utterance.