"And God blessed the seventh day, and hallowed it" (Gen. 2:3). The Holy One, blessed be He, blessed and hallowed the Sabbath day, and Israel is bound only to keep and to hallow the Sabbath day. Hence they said: Whosoever says the benediction and sanctification over the wine on the eves of Sabbath, his days will be increased in this world, and in the world to come, as it is said, "For by me thy days shall be multiplied" (Prov. 9:11) in this world; "and the years of thy life shall be increased" (ibid.) in the world to come.