Reference for Temurah 9:13

קתני אם ישראל הוא מחזיר תיובתא דאביי

but not from the inferior?<span class="x" onmousemove="('comment',' On behalf of the good grain, for it is forbidden to do so. This is a matter therefore for which there is a Scriptural prohibition, although there would not be the punishment of lashes in this case, since the prohibition is merely derived by implication from the positive precept.');">¹²</span>

Jastrow