The Tzadikim Nistarim (Hebrew: צַדִיקִים נִסתָּרים, "hidden righteous ones") or Lamed Vav Tzadikim (Hebrew: ל"ו צַדִיקִים,x"36 righteous ones"), often abbreviated to Lamed Vav(niks),[a] refers to 36 righteous people, a notion rooted within the more mystical dimensions of Judaism. The singular form is Tzadik Nistar (Hebrew: צַדִיק נִסתָר).