Which story of Sanjay the javelin that changes into a Garland

Hi everybody

My guru told me by any means to locate this story for him. Below is how he explained the story 😊

You guys are experts on the Mahabharata can you help me out? Thank you


"There is a story in the Mahabharata about Sanjay, who observed the fighting and reported back to the blind king.

At the beginning of the battle, Sanjay is accused of being a spy by some of the generals of the Pandavas army. The miracle is that Krishna , in order to satisfy the general's fears, threw a javelin at Sanjay. Before it struck him, it turned into as garland"