Ezekiel 40:38

And the chambers and the entries thereof {were} by the posts of the gates, where they washed the burnt offering.

A room with its door was by the posts at the gates. They washed the burnt offering there.

וְלִשְׁכָּ֣ה וּפִתְחָ֔הּ בְּאֵילִ֖ים הַשְּׁעָרִ֑ים שָׁ֖ם יָדִ֥יחוּ אֶת־הָעֹלָֽה׃

vlishkah vpitḥah bʾeyliym hashʿariym sham yadiyḥv ʾet-haʿolah