Reference for Niddah 115:54
ולענין דינא תנן אבל לענין טומאה היא טהורה וחבירתה טמאה
of a tall one, if [a blood stain]<span class="x" onmousemove="('comment',' Discovered subsequently. ');"><sup>47</sup></span> corresponds to the position of the pudenda of the tall one, they are both unclean, but if it does not correspond to it,<span class="x" onmousemove="('comment',' Not reaching so low. ');"><sup>48</sup></span> the tall one is clean while the short one is unclean. Another Baraitha taught: If a woman examined her shirt<span class="x" onmousemove="('comment',' Var. lec., 'herself and her shirt' (v. BaH.). ');"><sup>49</sup></span> and then<span class="x" onmousemove="('comment',' Having made sure that it was clean. ');"><sup>50</sup></span> lent it to her friend,<span class="x" onmousemove="('comment',' And subsequently a stain was found on it. ');"><sup>51</sup></span> she is clean, but her friend may attribute it<span class="x" onmousemove="('comment',' The stain. ');"><sup>52</sup></span> to her. R. Shesheth explained: This<span class="x" onmousemove="('comment',' That the borrower may attribute the stain to the lender. ');"><sup>53</sup></span> was learnt only in regard to the civil law,<span class="x" onmousemove="('comment',' Sc. the lender, having no valid proof that the shirt was clean when she had lent it to the other, has no legal claim on the other for the cost of washing. ');"><sup>54</sup></span> but as regards the law of uncleanness the lender is clean while her friend is unclean.