Reference for Yevamot 218:4
ערבי שלציון דעבדי שלוף דוץ תוקע עצמו לדבר הלכה דתניא רבי יוסי אומר כל האומר אין לו תורה אין לו תורה פשיטא אלא כל האומר אין לו אלא תורה אין לו אלא תורה
'From acting as surety [refers to would-be] sureties in Shalzion.<span class="x" onmousemove="('comment',' Where debts were collected from the guarantors and not from the creditors. [H] is a place name (Rashi); perhaps Seleucia, or an abbreviation of [H], v. note 10. ');"><sup>9</sup></span> For R. Isaac said, 'What was meant by the Scriptural text, He that is surety for a stranger shall smart for it?<span class="x" onmousemove="('comment',' Prov. XI, 15. ');"><sup>10</sup></span> Evil after evil<span class="x" onmousemove="('comment',' The inference is based on the expression [H] (in which the rt. [H] which is also that of [H] 'evil' is repeated). ');"><sup>11</sup></span>