I don’t think this one is very widespread yet, but it appeared on a Facebook page called “Spreading Buddhism,” with an attribution to the Buddha. Perhaps we can nip it in the bud.
The full quote is:
Real peace and happiness has to come from the heart, from within. So therefore, to eliminate wars and destroying each other, to eliminate famine, disease and earthquakes, and to eliminate all other disasters an unfavourable experiences, all this can be stopped by having loving kindness toward each other. From having a good heart with loving kindness, negative action cannot arise.
The first sentence has obvious resonances with “Peace comes from within. Do not seek it without,” which I’ve covered elsewhere.”
The language (happiness coming from within — negative action) is all completely wrong for something said by the Buddha.
The quote is generally attributed to Lama Zopa Rinpoche, but I haven’t yet found an original source, so I can’t be 100% sure that’s correct. But it does sound like something a Tibetan Buddhist like Lama Zopa would say. The idea that lovingkindness can stop earthquakes is rather touching.
The Spreading Buddhism page offers an eclectic mix of genuine canonical quotes, quotes by other non-Buddhists such as Lao Tzu, contemporary teachers like Pema Chodron, and a good number of classic Fake Buddha Quotes.