Arcana Coelestia #4123
4123. A way of seven days. That this signifies the holy of truth, is evident from the signification of a “way,” as being truth (n. 627, 2333); and from the signification of “seven,” as being what is holy (n. 395, 433, 716, 881). Here the signification is that there was the ardor of conjunction, that is, of conjoining itself with the holy of truth.
Arcana Coelestia #432
432. Verse 24. If Cain shall be avenged sevenfold, truly Lamech seventy and sevenfold. These words signify that they had extinguished the faith meant by “Cain” to do violence to which was sacrilege, and at the same time had extinguished the charity which should be born through faith, a far greater sacrilege, and that for this there was condemnation, that is, a “seventy and sevenfold avengement.”