Isaiah 56:6-7

“Also the foreigners who join themselves to the Lord, To minister to Him, and to love the name of the Lord, To be His servants, every one who keeps from profaning the sabbath And holds fast My covenant; Even those I will bring to My holy mountain And make them joyful in My house of prayer. Their burnt offerings and their sacrifices will be acceptable on My altar; For My house will be called a house of prayer for all the peoples.”