Reference for Bava Batra 351:9
ור' יוחנן אמר אחד זה ואחד זה אינו גובה אלא מנכסים בני חורין ואף על גב דכתב ביה ופלוני ערב
[IF THE GUARANTEE AND SIGNATURE OF] A GUARANTOR APPEAR BELOW THE SIGNATURES TO BONDS OF INDEBTEDNESS, etc. Rab said: [If the guarantee appears] before the signatures on the bond, [the debt] may be recovered from mortgaged property; if after the signatures on the bond, [it] may be recovered from free property [only]. At times, Rab said: Even [if the guarantee appears] before the signatures on the bond [the debt] may be recovered from free property only. [This, surely, presents] a contradiction [between one ruling] of Rab and the other ruling of his!<span class="x" onmousemove="('comment',' Lit., 'on Rab'. ');"><sup>17</sup></span> — There is no contradiction. The one<span class="x" onmousemove="('comment',' Where the guarantor's mortgaged property may not be seized. ');"><sup>18</sup></span>