Reference for Bava Batra 333:3

ההוא בזבינא דאתא לקמיה דאביי אמר ליה ניחזי לי מר חתימות ידיה דכי אתו רבנן מחוו לי מעברנא להו בלא מכסא אחוי ליה בריש מגילתא הוה קא נגיד ביה א"ל כבר קדמוך רבנן

I will allow them to pass without [payment of] the toll'.<span class="x" onmousemove="('comment',' His possession of Abaye's signature, he contended, would enable him to check the signature on any authorisation that might be presented to him. ');">¹³</span> He was writing it down<span class="x" onmousemove="('comment',' Lit., 'he showed'. ');">¹⁴</span> for him at the top of a scroll. As [the other] was pulling it,<span class="x" onmousemove="('comment',' The scroll; so that the signature might appear lower and a margin be left above it. ');">¹⁵</span> he<span class="x" onmousemove="('comment',' Abaye. ');">¹⁶</span> said to him,'The Rabbis have long ago anticipated you'.<span class="x" onmousemove="('comment',' V. previous paragraph. ');">¹⁷</span> Abaye said: [Numbers] from three to ten [should] not be written at the end of a line, [because] forgery might be committed by adding letters to them;<span class="x" onmousemove="('comment',' Lit., 'and write'. The Hebrew units from three to ten can easily be increased by the addition of [H], in, [H], three would thus become [H], thirty; [H], four, [H], forty; and so on. ');">¹⁸</span>

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