Hebrews 9:13

9:13 For if the blood of goats and bulls and the ashes of a young cow sprinkled on those who are defiled consecrated them and provided ritual purity, ¹ 

Hebrews 9:18

9:18 So even the first covenant was inaugurated with blood. ² 

Hebrews 9:26

9:26 for then he would have had to suffer again and again since the foundation of the world. But now he has appeared once for all at the consummation of the ages to put away sin by his sacrifice.

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¹ tn Grk “for the purifying of the flesh.” The “flesh” here is symbolic of outward or ritual purity in contrast to inner purity, that of the conscience (cf. Heb 9:9).

² sn The Greek text reinforces this by negating the opposite (“not even the first covenant was inaugurated without blood”), but this double negation is not used in contemporary English.