Reference for Bava Metzia 55:7

מדת ארכו ומדת רחבו ומדת גמיו ינתן למדת ארכו ורחבו

[If one states] identification marks, and [another also states] identification marks and [produces] one witness — one witness is as non-existent, and so it must be left. [If one produces] witnesses of weaving,<span class="x" onmousemove="('comment',' That he wove it. ');">⁶</span>

Jastrow