Reference for Pesachim 172:12

אמר רבינא ונותנין שכר דמים וצריך האחרון להוסיף דמים ולית הלכתא כוותיה:

Why did you drink it in two times? ' - Said he to them: 'Because it was taught: He who drinks his goblet in once is a gourmand; in two times, shows good breeding; in three times, is of the arrogant. Why did you not turn your face away? '<span class="x" onmousemove="('comment',' Which would have been more mannerly in their opinion.');">¹²</span>

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