And they were calling out to one another: ”Holy, holy, holy is the LORD of Hosts; all the earth is full of His glory.” … Then I said: ”Woe is me, for I am ruined, because I am a man of unclean lips dwelling among a people of unclean lips; for my eyes have seen the King, the LORD of Hosts.” Then one of the seraphim flew to me, and in his hand was a glowing coal that he had taken with tongs from the altar. And with it he touched my mouth and said: “Now that this has touched your lips, your iniquity is removed and your sin is atoned for.”
Isaiah 6:3, 5-7 (BSB)
קָדוֹשׁ קָדוֹשׁ קָדוֹשׁ יְהוָה צְבָאוֹת מְלֹא כָל־הָאָרֶץ כְּבוֹדוֹ
