Here is the example from Mark 10
Mark 10:31 But many who are first will be last, and the last will be first.Not surprisingly, many of Jesus' most memorable phrases are in the form of a chiasmus. Here are some others.
Mark 8:35 For those who want to save their life will lose it, and those who lose their life for my sake, and for the sake of the gospel, will save it.
Matt. 23:12 All who exalt themselves will be humbled, and all who humble themselves will be exalted.Can you think of any more?