" He knew only too well which warrior had been detected in Crookedstar’s territory. Would any of the RiverClan warriors recognize his scent tonight? Graystripe sat motionless, not taking his eyes off the leaders on the Great Rock. Tigerclaw’s deep growl sounded from the crowd. “We have scented ShadowClan in our territory as well as RiverClan this past moon. And not just one warrior, but a whole patrol, always the same cats.” The ShadowClan leader’s eyes flashed indignantly. “ShadowClan has not been in your territory "

― Erin Hunter , Fire and Ice (Warriors, #2)