Genesis 4:15

¹⁵ And the Lord said, Truly, if Cain is put to death, seven lives will be taken for his. And the Lord put a mark on Cain so that no one might put him to death.

Arcana Coelestia #376

376. 'Blood ¹ calling out' means guilt. This follows from what is said above, for those who resort to violence are held guilty, as in David,

Evil will slay the wicked, and those who hate the righteous will beheld guilty. Psalms 34:21.

In Ezekiel,

You, the city, have become guilty through the blood you have shed. Ezekiel 22:4.

Footnotes:

1. literally, bloods

Thanks to the Swedenborg Society for the permission to use this translation.