Rashi on Exodus 22:6/רש"י על שמות כ״ב:ו׳

1וגנב מבית האיש AND IT BE STOLEN OUT OF THE MAN’S HOUSE — i. e. according to his statement),

2אם ימצה הגנב ישלם IF THE THIEF BE FOUND HE — the thief — SHALL PAY שנים DOUBLE to the owner (to the bailor not to the bailee) (Bava Kamma 63b).