Leviticus 1:11

על ירך המזבח means ON THE SIDE OF THE ALTAR (cf. Rashi on Exodus 40:22). 'צפנה לפני ה NORTHWARD BEFORE THE LORD — but the law of slaughtering northward is not necessarily applicable in the case of a “Bamah” (i. e. an animal offered on a “Bamah” as an עולה need not be slaughtered at its north side, for it states here: northward before the Lord, the last words being used only of the Tabernacle and the Temple; cf. Zevachim 119b and Rashi on 'לפני ה‎ וסמך, v. 3).

וְשָׁחַ֨ט אֹת֜וֹ עַ֣ל יֶ֧רֶךְ הַמִּזְבֵּ֛חַ צָפֹ֖נָה לִפְנֵ֣י יְהֹוָ֑ה וְזָרְק֡וּ בְּנֵי֩ אַהֲרֹ֨ן הַכֹּהֲנִ֧ים אֶת־דָּמ֛וֹ עַל־הַמִּזְבֵּ֖חַ סָבִֽיב׃

And he shall kill it on the side of the altar northward before the Lord: and the priests, Aharon’s sons, shall sprinkle its blood round about on the altar.