On the duel stage.

Shi Lang challenged the old man without any reservations. He knew how to settle this grudge. If he did not ask Peak Master Cao for an explanation, his future path would become tough. The knots in his heart will become the biggest obstacle in his path of Dao. 

The people from the sect were shocked. Ling Ye knew Shi Lang's identity, and he was the disciple of the Third Ancestor. If Peak Master Cao had caused him any severe injury, the elder would not have taken that lightly when his fellow elders urged him to take action. Ling San told him to keep things subtle and let them handle them themselves. 

Another thing that Ling Ye had to keep in mind was the favor Shi Lang had done for the sect by leaving the Inheritance palace in his care for the united growth of the three sects. If that was not all, Shi Lang was backed by Tian Long, and now that he had revealed a heavenly spirit artifact, they were all bound by the pressure Raksha had channeled over them.