Esias 56:3

3 Let not the stranger who attaches himself to the Lord, say, Surely the Lord will separate me from his people: and let not the eunuch say, I am a dry tree.

Esias 56:3 In-Context

1 Thus saith the Lord, Keep ye judgment, and do justice: for my salvation is near to come, and my mercy to be revealed.
2 Blessed is the man that does these things, and the man that holds by them, and keeps the sabbaths from profaning them, and keeps his hands from doing unrighteousness.
3 Let not the stranger who attaches himself to the Lord, say, Surely the Lord will separate me from his people: and let not the eunuch say, I am a dry tree.
4 Thus saith the Lord to the eunuchs, as many as shall keep my sabbaths, and choose the things which I take pleasure in, and take hold of my covenant;
5 I will give to them in my house and within my walls an honourable place, better than sons and daughters: I will give them an everlasting name, and it shall not fail.

The Brenton translation of the Septuagint is in the public domain.