וְלָקַחְתָּ֣ מִדָּמ֗וֹ וְנָ֨תַתָּ֜ה עַל־אַרְבַּ֤ע קַרְנֹתָיו֙ וְאֶל־אַרְבַּע֙ פִּנּ֣וֹת הָעֲזָרָ֔ה וְאֶֽל־הַגְּב֖וּל סָבִ֑יב וְחִטֵּאתָ֥ אוֹת֖וֹ וְכִפַּרְתָּֽהוּ׃
你要取些公牛的血，抹在祭壇的四個壇角上、壇台的四個角上，以及四圍的邊框上；這樣，你就潔淨了祭壇，為它贖罪。
Tze'enah Ure'enah
“And you should take” [43:20]. You should take the blood of the ox and sprinkle it on the four corners of the House to purify the House. Burn the ox outside the House.
Rashi
and make it fit for atonement You shall “wipe” it of its ordinariness to initiate it into sanctity, so that it will befit for [providing] atonement from then on.