Tosefta su II Re 21:32

A ma’aseh about two priestly brothers were running next to one another and they were going up the ramp. One of them preceded his fellow to the four amot. One of them took a knife and stabbed him in his heart. Rabbi Tzadoq came stood on the steps of the porch on the Temple Mount and said, “Hear me, my brothers, the house of Israel. Indeed it is said, ‘If someone is found slain in the land’ (Deut 21:1). And us, from where shall we measure? From the Sanctuary or from the courtyard?” All of Israel moaned in tears after his [words]. After that, the father of the boy came. He said to them, “I shall atone for you! My son is [still] convulsing, so the knife has not become impure.” This teaches that the impurity of the knife was more serious to them than the shedding of blood. And so it says, “And also Manasseh spilled innocent blood” (II Kings 21:16). From here , they say, for the sin of bloodshed, the shekhinah was taken away and the Temple was rendered impure.

It happened that two priests were running to go up the ramp. One pushed his fellow into the four cubit space. He took a knife and stabbed him in the chest. R. Zadok came and stood on the steps leading up the Ulam and said, "Hear me my Israelite brothers. Behold it says, (Deuteronomy 21) 'When one finds a dead body...and the elders and judges shall go out and measure...' Let us measure who should bring the calf, the sanctuary or the courtyards." Everyone groaned and cried. Afterwards the father of the young [priest] came and said, "My brothers, I am your atonement. My son's pulse is still beating and the knife has not yet been defiled." This shows that the impurity of the knife was more difficulty for Israel than bloodshed. And so it says, "Moreover, Manasseh put so many innocent persons to death that he filled Jerusalem [with blood] from end to end." From here they said, "Through the sin of bloodshed the Shekhinah departs and the Temple is defiled."