Reference for Chullin 281:45

והא הכא דלאו שניתק לעשה הוא דרחמנא אמר (ויקרא יט, יג) לא תגזול (ויקרא ה, כג) והשיב את הגזלה שמע מינה

and also: He shall restore that which he took by robbery?<span class="x" onmousemove="('comment',' Ibid. V, 23. This precept obviously can only be taken as a remedial act for the preceding prohibition; nevertheless according to R. Judah the robber incurs the penalty of stripes.');"><sup>33</sup></span>