Reference for Shabbat 106:21

זכרים יוצאין לבובין: מאי לבובין אמר רב הונא תותרי מאי משמע דהאי לבובין לישנא דקרובי הוא דכתיב (שיר השירים ד, ט) לבבתני אחותי כלה

The Master said: 'A <i>zab</i> may not go out with his pouch, nor goats with the pouch attached to their udders.' But it was taught: Goats may go out with the pouch attached to their udders? Said Rab Judah, There is no difficulty: Here it means that it is tightly fastened;<span class="x" onmousemove="('comment',' And there is no fear of its falling off, so that the owner may carry it. ');">¹⁹</span>

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