He who strikes a Brahman shall remain in hell a thousand years.

Great, however, is the power of sincere devotion.

By repentance, open confession, reading the Scripture, almsgiving, and reformation, one is released from guilt.
Devotion, it is said, is equal to the performance of all duties; and even the souls of worms and insects and vegetables attain heaven by the power of devotion.

But especially great is the sanctifying influence of the Vedas.

He who can repeat the whole of the Rig-Veda would be free from guilt, even if he had killed the inhabitants of the three worlds.
The last book of Manu is on transmigration and final beatitude.