Ibn Abdul Barr (rahimahullaah) said: Al-Hasan (rahimahullaah) said:

”The punishment for a scholar is the demise of the heart; so it was said to him: ”What is the demise of the heart?” He said: ”Seeking the worldly life through actions that are done for (reward) in the afterlife.”

[Jaami Bayaanil Ilm Wa-Fadlihi: 272]