Exodus 19:5-8

So now if you obey me and keep my agreement, you will be my own possession, chosen from all nations. Even though the whole earth is mine, you will be my kingdom of priests and a holy nation.’ You must tell the Israelites these words.” So Moses went down and called the elders of the people together. He told them all the words the LORD had commanded him to say. All the people answered together, “We will do everything he has said.” Then Moses took their answer back to the LORD.