« Previous Positive Commandment 161 Next » Positive Commandment 163 The 162nd mitzvah is that we are commanded to refrain from doing melachah on Shavuos.1 The source of this commandment is G‑d's statement,2 "This very day shall be celebrate as a sacred holiday." « Previous Positive Commandment 161 Next » Positive Commandment 163 Footnotes 1. Outside of Eretz Yisrael, this mitzvah is for two days. This applies for all other Yomim Tovim as well, except for Rosh HaShanah, which lasts two days even in Eretz Yisrael, and Yom Kippur, which is observed for one day everywhere. 2. Lev. 23:21.