Sam Guevenne is a character in The Elder Scrolls V: Skyrim. He challenges the Dragonborn to a drinking competition. Accept his challenge and he offers a staff as a reward. By taking two drinks of his special ale, The Dragonborn blacks out and ends up in Markarth at the Temple of Dibella. Cleaning his or herself up, the priestess, Senna, directs them to Rorikstead.
He reveals himself to be Sanguine, and at the end of the quest he gives you Sanquine’s Rose, the Staff that he originally promised you during the drinking contest.