On this page of Assassin's Creed Valhalla's guide you will find a detailed walkthrough for Hunted.
Eivor spared Leofrith, and as a token of gratitude, he revealed to him information about the Zealots and a note that threatens his life. Eivor must go to Venonis to destroy the document.
You have a certain amount of time to complete this task. The note must be destroyed before dark. Unfortunately, it may happen that after logging out of the game the time of the day may change, and the possibility of destroying the letter will be lost so do not postpone this task.
Rewards: 1 700 XP.
Burn the kill order at Venonis
The best way to get there is to use the fast travel option. Once you are in Venonis you will have to locate the statue that Leofrith spoke about earlier.
The exact location is not visible on the map, but you just need to turn in the direction visible in the picture above, and easily locate the statue that Leofirth spoke about.
Approach the note and then read it to destroy the document. As a reward you will receive 1 700 XP.
From now on, Zealots will not hunt you actively, but they still remain dangerous enemies that can attack when you are nearby.