Kubera was appalled by Ravana's repeated attacks on the priests, on the devas, and on his own yakshas, so he sent a message to him, brother to brother. "Your deeds dishonor our father," Kubera's messenger told Ravana. "You need to stop your bad behavior."
Enraged, Ravana shouted, "I will kill Kubera for this! And I will kill all the other guardians of the world as well. Nobody speaks to Ravana this way!"
Then Ravana seized Kubera's messenger and sliced off his head.
"Come, rakshasas!" Ravana shouted, and he led his army in an attack on Kubera's home in the Himalayas.