Shatapatha Brahmana 11.2.7.33

11.2.7.33

atha haiṣaiva tulā yaddakṣiṇo vedyantaḥ sa yatsādhu karoti tadantarvedyatha yadasādhu tadbahirvedi tasmāddakṣiṇaṃ vedyantamadhispṛśyevāsīta tulāyāṃ ha vā amuṣmiṃloka ādadhati yataradyaṃsyati tadanveṣyati yadi sādhu vāsādhu vetyatha ya evaṃ vedāsminhaivaloke tulāmārohatyatyamuṣmiṃloke tulādhānam mucyate sādhukṛtyā haivāsya yacati na pāpakṛtyā

Now, as to that balance, the right (south) edge of the Vedi. Whatever good deed man does that is inside the Vedi; and whatever evil deed he does that is outside the Vedi. Let him therefore sit down, touching the right edge of the Vedi; for, indeed, they place him on the balance in yonder world; and whichever of the two will rise that he will follow, whether it be the good or the evil. And, verily, whosoever knows this, mounts the balance even in this world, and escapes being placed on the balance in yonder world; for his good deed rises, and not his evil deed.