In December of 1925 I went to America to give lectures at MIT. I was editor of the Zeitschrift für Physik, and Jordan gave me a paper to be published in the journal. I didn't find time to read it and put it in my suitcase. I forgot about it, and when I returned half a year later and unpacked, I found the paper at the bottom of the suitcase. It contained the Fermi-Dirac statistics. Meanwhile both Fermi and Dirac had discovered it. But Jordan was the first.
The Max Born quote, and more about Jordan, can be found in Engelbert Schuckings reminescences "Jordan, Pauli, Politics, Brecht... and a Variable Gravitational Constant" (in On Einstein's path: Essays in Honor of Engelbert Schucking).