"If you restrain your foot because it is the Sabbath; refrain from accomplishing your own needs on My holy day; if you proclaim the Sabbath 'a delight' and the holy [day] of Hashem 'honored', and you honor it by not engaging in your own affairs, from seeking your own needs or discussing the forbidden--then you will delight in Hashem, and I will mount you astride the heights of the world; I will provide you the heritage of your forefather Jacob, for the mouth of Hashem has spoken." [Isaiah 58:13] 