The seventh day is the sabbath of rest. This is a very strong expression, literally, the sabbath of sabbatism, which doubles the force of the single word. Ye shall do no work therein. The sabbath and the Day of Atonement were the only days in which no work might be done, whereas on the other festivals it was only no servile work that might be done.
It is not to be observed solely where the tabernacle is pitched or the temple is built, but in every town and village of Canaan—in all your dwellings. In the sanctuary itself the peculiar characteristics of the sabbath were a holy convocation, the renewal of the shewbread, and the burnt offering of two lambs with their meat and drink offerings (Numbers 28:9, Numbers 28:10); elsewhere it was observed only by the holy convocation and rest from all labour.
It commenced at sunset on Friday evening, and continued till sunset on Saturday evening. In later days the hour at which it began was announced by three blasts of the priests' trumpets, immediately after which a new course of priests entered on their ministry.