Esias 56:6

6 And to the strangers that attach themselves to the Lord, to serve him, and to love the name of the Lord, to be to him servants and handmaids; and all that keep my sabbaths from profaning , and that take hold of my covenant;

Esias 56:6 In-Context

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.
6 And to the strangers that attach themselves to the Lord, to serve him, and to love the name of the Lord, to be to him servants and handmaids; and all that keep my sabbaths from profaning , and that take hold of my covenant;
7 I will bring them to my holy mountain, and gladden them in my house of prayer: their whole-burnt-offerings and their sacrifices shall be acceptable upon mine altar; for my house shall be called a house of prayer for all nations,
8 saith the Lord that gathers the dispersed of Israel; for I will gather to him a congregation.

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