In conclusion, although this expression and its ascription are popular the currently available evidence is unsatisfactory. The first citation in English is dated in 1950 and this is more than a decade after Freud’s death in 1939. Alan C. Elms has called the remark “Freud’s ultimate anti-Freudian joke” and has argued that the quip is not consistent with Freud’s other pronouncements. Unless additional documentation is located QI believes it is reasonable to assert that Freud probably did not make this statement. Thanks for your question.
in 1909, Jung traveled with Freud and the Hungarian psychoanalyst Sándor Ferenczi to the United States; they took part in a conference at Clark University in Worcester , Massachusetts . The conference at Clark University was planned by the psychologist G. Stanley Hall and included twenty-seven distinguished psychiatrists, neurologists and psychologists. It represented a watershed in the acceptance of psychoanalysis in North America. This forged welcome links between Jung and influential Americans.  Jung returned to the United States the next year for a brief visit.