Do you not hear?

Bismillah
Asalam u Alaykum

Abu Umamah (radi allahu anhu) narrated: The companions of Allah`s
Messenger (peace be upon him) mentioned the world before him. He (peace be upon him) said,
Do you not hear? Do you not hear? Simplicity is (prat) of Iman,
Simplicity is (part) of iman."