After Aliyah Bet, the process of numbering or naming individual aliyot ceased, but immigration did not. A major wave of Jewish immigration, mainly from post-Holocaust Europe and the Arab and Muslim world took place from 1948 to 1951. In three and a half years, the Jewish population of Israel, which was 650,000 at the state's founding, was more than doubled by an influx of about 688,000 immigrants. In 1949, the largest-ever number of Jewish immigrants in a single year - 249,954 - arrived in Israel. This period of immigration is often termed "kibbutz galuyot" (literally, ingathering of exiles), due to the large number of Jewish diaspora communities that made aliyah. However, "kibbutz galuyot" can also refer to aliyah in general.