Reference for Menachot 38:13

והיכא קיימתה אמר רב אשי קסבר האי תנא כוליה מזבח בצפון קאי

but you can answer, Wherever you find two texts, one self-confirmatory and confirming the words of the other, whereas the second is self-confirmatory but annuls the words of the other, we abandon the latter and accept the former. Thus when you emphasize 'before the Lord', i.e., on the west side [of the altar], you annul 'to the front of the altar', which is on the south side; when you emphasize 'to the front of the altar', i.e., on the south side, you confirm 'before the Lord', which is on the west side.

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