Isaiah 56:2

How blessed is the man who does this,

And the son of man who takes hold of it,

Who keeps from profaning the sabbath,

And keeps his hand from doing any evil.”

Isaiah 56:4

For thus says Yahweh,

“To the eunuchs who keep My sabbaths,

And choose what pleases Me,

And hold fast My covenant,

“Also the foreigners who join themselves to Yahweh,

To minister to Him, and to love the name of Yahweh,

To be His slaves, every one who keeps from profaning the sabbath

And takes hold of My covenant,

Even those I will bring to My holy mountain

And make them glad in My house of prayer.

Their burnt offerings and their sacrifices will be acceptable on My altar;

For My house will be called a house of prayer for all the peoples.”