Exodus 19:5-6

Amplified Bible

⁵ Now therefore, if you will in fact obey My voice and keep My covenant (agreement), then you shall be My own special possession and treasure from among all peoples [of the world], for all the earth is Mine; ⁶ and you shall be to Me a kingdom of priests and a holy nation [set apart for My purpose].’ These are the words that you shall speak to the Israelites.”