וּבַגֶּ֖פֶן שְׁלֹשָׁ֣ה שָׂרִיגִ֑ם וְהִ֤יא כְפֹרַ֙חַת֙ עָלְתָ֣ה נִצָּ֔הּ הִבְשִׁ֥ילוּ אַשְׁכְּלֹתֶ֖יהָ עֲנָבִֽים׃
און אױפֿן װײַנשטאָק דרײַ צװײַגן; און װי ער בליט, איז אױפֿגעגאַנגען זײַן בליעכץ, האָבן זײַנע הענגלעך געצײַטיקט װײַנטרױבן.
Zohar
And since we draw this eth down upon us, we have at the same time to say prayers and praises, and therefore it is forbidden to greet any man until one has said his prayers, and if he does so he draws a “high place” down upon himself instead of this eth.