Reference for Bava Metzia 117:9
אמר רב יהודה לעולם יהא אדם זהיר בתבואה בתוך ביתו שאין מריבה מצויה בתוך ביתו של אדם אלא על עסקי תבואה שנאמר (תהלים קמז, יד) השם גבולך שלום חלב חטים ישביעך אמר רב פפא היינו דאמרי אינשי כמשלם שערי מכדא נקיש ואתי תיגרא בביתא
R. Hisda said: All gates are locked, excepting the gates [through which pass the cries of] wrong [ona'ah], for it is written, Behold the Lord stood by a wall of wrongs, and in his hand were the wrongs.<span class="x" onmousemove="('comment',' [H] Amos VII, 7(E.V. 'plumbline') is here connected with [H], 'overreaching', 'wronging', i.e., God is always ready to plead the cause of one who has been wronged. ');"><sup>17</sup></span> R. Eleazar said: All [evil] is punished through an agent, excepting wrong, for it is written, And in his hand were the wrongs.<span class="x" onmousemove="('comment',' I.e., God in person punishes these. ');"><sup>18</sup></span>