Acts 17:23

23 For as I went through the city and looked carefully at the objects of your worship, I found among them an altar with the inscription, "To an unknown god.' What therefore you worship as unknown, this I proclaim to you.

Acts 17:23 In-Context

21 Now all the Athenians and the foreigners living there would spend their time in nothing but telling or hearing something new.
22 Then Paul stood in front of the Areopagus and said, "Athenians, I see how extremely religious you are in every way.
23 For as I went through the city and looked carefully at the objects of your worship, I found among them an altar with the inscription, "To an unknown god.' What therefore you worship as unknown, this I proclaim to you.
24 The God who made the world and everything in it, he who is Lord of heaven and earth, does not live in shrines made by human hands,
25 nor is he served by human hands, as though he needed anything, since he himself gives to all mortals life and breath and all things.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.