Isaiah 56:2-6

2Blessed is the one who does this, the son of man who takes hold of it, who keeps from profaning Shabbat, and keeps his hand from doing any evil.

3Do not let a son of a foreigner who has joined himself to Adonai say, ‘Adonai will surely exclude me from His people.” Nor let the eunuch say, ‘Behold, I am a dry tree.’”

4For thus says Adonai, “To the eunuchs who keep My Shabbatot, who choose what pleases Me, and hold fast My covenant:

5I will give to them in My House and within My walls a memorial and a name better than sons and daughters. I will give them an everlasting name that will not be cut off.

6Also the foreigners who join themselves to Adonai, to minister to Him, and to love the Name of Adonai, and to be His servants— all who keep from profaning Shabbat, and hold fast to My covenant—