Le Lévitique 4:6 Midrash : Sifra

4) "And he shall slaughter the bullock before the L–rd" — in the north. It is written here (Vayikra 4:17): "before the parocheth," and elsewhere, (Vayikra 4:6): "before the parocheth." Just as "parocheth" there is "before the parocheth of the holiness" (i.e., in alignment with the staves of the ark), so, "parocheth" here is before the parocheth of the holiness.

8) "And he shall dip … and he shall sprinkle": For every sprinkling a (separate) dipping. It is written here "his finger," and elsewhere (Vayikra 4:6), "his finger." Just as "finger" here indicates the most adroit ("meyumeneth") finger on his right hand, (this being the thrust of ("finger hayemanith"), so "his finger" there indicates the most adroit finger on his right hand (i.e., the index finger).

8) (Vayikra 4:6): "And the Cohein shall dip his finger into the blood.": He shall dip and not wipe, (against the wall of the vessel. It must contain enough blood for him to "dip" his finger into it.) "And he shall dip … and he shall sprinkle (seven times"): for every sprinkling, a dipping (and not one dipping for all the sprinklings.) "his finger": "his finger" is written here and elsewhere (Vayikra 14:16, in respect to a leper). Just as "his finger" there is the most dexterous (i.e., the index finger) of the right hand, so, "his finger" here.