Exodus 19:3-6
19:3 Then Moses went up to God, and the LORD called to him from the mountain [Mt. Sinai] and said, “This is what you are to say to the house of Jacob and what you are to tell the people of Israel:

19:4 `You yourselves have seen what I did to Egypt, and how I carried you on eagles’ wings and brought you to myself.

19:5 Now if [reminder that the people could choose or reject God’s covenant initiated by God at Mt. Sinai] you obey me fully [to obey all of God’s laws all the time; cf. Jer. 11:7-8] and keep my covenant, then [1] out of all nations you [points to Israel’s relationship with the Lord] will be my treasured [special; the one most highly prized] possession. Although the whole earth is mine,

19:6 [2] you will be for me a kingdom of priests [points to Israel’s special role: to represent God to the world and to represent the world to God; Israel was to be a missionary people, bringing people from all nations to Him] and [3] a holy [to be set apart; points to a distinctive lifestyle; God expected His people to live morally upright lives consistent with His character and nature] nation.’ These are the words you are to speak to the Israelites.”