What task did Kay tell Percival to complete before he would be allowed to speak with Arthur?

Sir Kay told Percival to kill a knight that was bothering King Arthur before he can speak with King Arthur. Percival is a young boy who was raised by his mother in the forests of Wales, UK. He wanted to be a knight so travelled to King Arthur's court when he was teased by Sir Kay. After Percival had killed the knight and taken his vermilion armor, he set out for adventure. He trained with an experienced knight, Gornemant, and ends up rescuing Gornemant's niece.