Thematic Bible: Strangers that are joined to the lord

Thus says the Lord: Keep justice, do and use righteousness (conformity to the will of God which brings salvation), for My salvation is soon to come and My righteousness (My rightness and justice) to be revealed. Blessed, happy, and fortunate is the man who does this, and the son of man who lays hold of it and binds himself fast to it, who keeps sacred the Sabbath so as not to profane it, and keeps his hand from doing any evil. Let not the foreigner who has joined himself to the Lord say, The Lord will surely separate me from His people. And let not the eunuch say, Behold, I am a dry tree. read more.
For thus says the Lord: To the eunuchs who keep My Sabbaths and choose the things which please Me and hold firmly My covenant -- " To them I will give in My house and within My walls a memorial and a name better [and more enduring] than sons and daughters; I will give them an everlasting name that will not be cut off. Also the foreigners who join themselves to the Lord to minister to Him and to love the name of the Lord and to be His servants, everyone who keeps the Sabbath so as not to profane it and who holds fast My covenant [by conscientious obedience] -- " All these I will bring to My holy mountain and make them joyful in My house of prayer. Their burnt offerings and their sacrifices will be accepted on My altar; for My house will be called a house of prayer for all peoples. Thus says the Lord God, Who gathers the outcasts of Israel: I will gather yet others to [Israel] besides those already gathered.