Ruth 2:10 Then she fell on her face, and bowed herself to the ground, and said unto him, why have I found grace in thine eyes, that thou shouldest take knowledge of me, seeing I am a stranger?
Ruth 2:11 And Boaz answered and said unto her, It hath fully been shewed me, all that thou hast done unto thy mother-in law since the death of thine husband: and how thou hast left thy father and thy mother, and the land of thy nativity, and art come unto a people which thou knew not heretofore. 12 The Lord recompense thy work, and a full reward be given thee of the Lord God of Israel, under whose wings thou art come to trust.
Furthermore, the stranger or foreigner was not to be excluded from the religious services, once he or she had fulfilled the prerequisites given by God. In fact, the 4th commandment pertaining to Sabbath worship, also includes the stranger that is within thy gates, from which the title of the study is lifted.
Isaiah 56: 3 Neither let the son of the stranger, that hath joined himself to the Lord, speak, saying, The Lord hath utterly separated me from his people: neither let the eunuch say, Behold, I am a dry tree. 6 Also the sons of the stranger, that join themselves to the Lord, to serve him, and to love the name of the Lord, to be his servants, everyone that keeps the sabbath from polluting it, and taketh hold of my covenant;
Isaiah 56:7 Even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt offerings and their sacrifices shall be accepted upon mine altar; for mine house shall be called a house of prayer for all people.
May The Lord add His blessing to the study of His word. God bless!