u/Gandalfthebran

Context: Legend has it Mahabharata was told by Ved Vyasa and written by Ganesha. That had a deal, Ganesha told Ved Vyasa he was only going to write it if he tells the shloka non stop in poetry form. Ved Vyasa then told Ganesha, ‘I accept but you need to understand every shloka before writing it down. Thus he would get time in between to breathe.

The broken Tusk of Ganesha in his iconography comes from this event. The peakcock feather would constantly break while writing so he broke his tusk to use as pen.