I’ve been going through the Bible looking for these phrases or their equivalents:
“They will be my people, and I will be their God”
“Then they will know that I am the LORD”
Side note: When the Old Testament shows “LORD” in all caps in our English translations, it indicates that the name of God is used: YHWH (or Yahweh). I don’t know why we don’t just use God’s name. In the times of Jesus’ visit to the earth the religious leaders of the day had a law of their own never to say God’s name for fear of mispronouncing it. That sounds like a pretty stupid law. Why not just use God’s name; he told us what it is, and it’s much more personal that saying Lord.
Anyway, today, I found that God says “I am Yahweh your God” 16 time in chapters 18-20 of Leviticus alone. Another 6 times he says a shortened version of the same thing, “I am Yahweh,” all in these three chapters.
In Lev 20:26, God tells the people that they are to be holy to him, “for I, Yahweh, am holy; and I have set you apart from the peoples to be mine.”
Yahweh is God and he chose a people for himself. This has proven to be a rewarding study, and I have a long way to go.