eta ātma-hano 'śāntā
ajñāne jñāna-māninaḥ
sīdanty akṛta-kṛtyā vai
kāla-dhvasta-manorathāḥ
ete - these; ātma-hanaḥ - killers of the self; aśāntāḥ - devoid of peace; ajñāne - in ignorance; jñāna-māninaḥ - presuming to have knowledge; sīdanti - they suffer; akṛta - failing to perform; kṛtyāḥ - their duty; vai - indeed; kāla - by time; dhvasta - destroyed; manaḥ-rathāḥ - their fanciful desires.
There is a similar verse in Śrī Īśopaniṣad (3):
asuryā nāma te lokā
andhena tamasāvṛtāḥ
tāṁs te pretyābhigacchanti
ye ke cātma-hano janāḥ
“The killer of the soul, whoever he may be, must enter into the planets known as the worlds of the faithless, full of darkness and ignorance.”