Диврей ха-ямим А 21:27 Каббала: Zohar

וַיֹּ֤אמֶר יְהוָה֙ לַמַּלְאָ֔ךְ וַיָּ֥שֶׁב חַרְבּ֖וֹ אֶל־נְדָנָֽהּ׃

И повелел Господь Ангелу; и он поднял свой меч обратно в ножны его.

Zohar

And so said Rabbi Joshua ben Levi, the Angel of Death said to me "If I was not concerned for the honor of creations, I would reveal to them the House of Slaughter, just as an animal"...