“However many holy words you speak however many you read, what good will they do you if you do not act on them?”
This popular quote is a paraphrase of verses 19 and 20 from the Dhammapada. It’s not very literal, but it more or less makes the same point as the original, so I’ve classed it as “Fakeish” rather than “Fake.”
Here’s Buddharakkhita’s version from Access to Insight:
19. Much though he recites the sacred texts, but acts not accordingly, that heedless man is like a cowherd who only counts the cows of others — he does not partake of the blessings of the holy life.
20. Little though he recites the sacred texts, but puts the Teaching into practice, forsaking lust, hatred, and delusion, with true wisdom and emancipated mind, clinging to nothing of this or any other world — he indeed partakes of the blessings of a holy life.
So it’s not a quote, but not a million miles off.
The reference to reading is an anachronism, of course. At the time of the Buddha the scriptures were recited rather than written down.