Reference for Zevachim 104:6

דמים (שיריים) הפנימיים יוכיחו שיש מהן קרב בחוץ ואם נתנן בתחלה בחוץ לא כיפר

you might therefore think that also if the blood which should be sprinkled above [the red line] was sprinkled below, it makes atonement. And it is [indeed] logical: Blood is prescribed above,<span class="x" onmousemove="('comment',' Viz., that of an animal sin-offering.');">⁸</span>

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