וַיָּ֨מָד אֶת־אָרְכּ֜וֹ עֶשְׂרִ֣ים אַמָּ֗ה וְרֹ֛חַב עֶשְׂרִ֥ים אַמָּ֖ה אֶל־פְּנֵ֣י הַֽהֵיכָ֑ל וַיֹּ֣אמֶר אֵלַ֔י זֶ֖ה קֹ֥דֶשׁ הַקֳּדָשִֽׁים׃
And he measured the length thereof, twenty cubits, and the breadth, twenty cubits, before the temple; and he said unto me: ‘This is the most holy place.’
Read midrashic interpretation of Ezekiel 41:4: and classical rabbinic exegesis.