[Feelundseenna]

... the dhammapada, which the Buddha did not teach.

how do you know?

as long as a teaching conforms with the main themes of the suttas, it is Buddhavaca

Neither of these is "cause-and-effect".

Yes. Neither of these is "cause-and-effect". But you previously asserted the claim that "causation becomes extinct" is utter nonsense

Then, monks, being subject myself to birth, seeing the drawbacks of birth, seeking the unborn, unexcelled rest from the yoke, Unbinding, I reached the unborn, unexcelled rest from the yoke: Unbinding. Being subject myself to aging... illness... death... sorrow... defilement, seeing the drawbacks of aging... illness... death... sorrow... defilement, seeking the aging-less, illness-less, deathless, sorrow-less, unexcelled rest from the yoke, Unbinding, I reached the aging-less, illness-less, deathless, sorrow-less, unexcelled rest from the yoke: Unbinding. Knowledge & vision arose in me: 'Unprovoked is my release. This is the last birth. There is now no further becoming.'

Ariyapariyesana Sutta: The Noble Search