וַהֲבִיאוֹתִ֞ים אֶל־הַ֣ר קָדְשִׁ֗י וְשִׂמַּחְתִּים֙ בְּבֵ֣ית תְּפִלָּתִ֔י עוֹלֹתֵיהֶ֧ם וְזִבְחֵיהֶ֛ם לְרָצ֖וֹן עַֽל־מִזְבְּחִ֑י כִּ֣י בֵיתִ֔י בֵּית־תְּפִלָּ֥ה יִקָּרֵ֖א לְכָל־הָעַמִּֽים׃
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 acceptable upon Mine altar; For My house shall be called A house of prayer for all peoples.
Rashi on Isaiah
for all peoples Not only for Israel, but also for the proselytes.
Ibn Ezra on Isaiah
For mine house shall be called an house of prayer for all people. Compare the prayer of King Solomon (1 Kings 8:41)