Exodus 19:5-6

19:5 And now, if you will diligently listen to me and keep my covenant, then you will be my special possession out of all the nations, for all the earth is mine, 19:6 and you will be to me a kingdom of priests and a holy nation.’ These are the words that you will speak to the Israelites.”

Deuteronomy 32:9

32:9 For the Lord’s allotment is his people,

Jacob is his special possession.

Malachi 3:17

3:17 “They will belong to me,” says the Lord who rules over all, “in the day when I prepare my own special property. I will spare them as a man spares his son who serves him.

Titus 2:14

2:14 He gave himself for us to set us free from every kind of lawlessness and to purify for himself a people who are truly his, who are eager to do good.