Maaseh Rav Siman 119
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טוב לעטר כוס של קדוש ובהמ"ז והבדלה בששה כוסות סביב וה"ה לכל היו"ד דברים וד' לעיכוב (ברכות ד' נ"א):
Sefaria Community Translation
It is good to adorn the cup for Kiddush, Benching, and Havdalah with six cups around it. This is the halacha for all the 10 things and 4 to prevent (Brachot 51)